Shulchan Arukh, Orach Chayim 128:28-30

Sugya Map

The Shulchan Arukh, Orach Chayim 128:28-30, offers a kaleidoscopic view into the intricate halachot surrounding Birkat Kohanim, the Priestly Blessing. This section, far from a mere procedural guide, delves into the chiyuv (obligation) of the Kohen, the conditions for its performance, and the myriad factors that can render a Kohen disqualified or necessitate an interruption in prayer. The sugya is fundamentally about balancing the Divine mandate to bless with the practical realities of communal prayer and individual Kohen status.

Core Issues

• Kohen's Obligation to Duchen (ברכת כהנים): The s'ifim explore the nature of the Kohen's chiyuv to ascend the duchan (platform). Is it an absolute, constant obligation, or conditional? What constitutes a "forfeited" mitzvah?
• Repetition of Birkat Kohanim: Can a Kohen perform Birkat Kohanim more than once in a day? What is the halachic basis for this, particularly regarding Bal Tosif (the prohibition against adding to mitzvot)?
• Kohen-Chazan Protocol: The unique halachic conundrum of a Kohen serving as the chazan (prayer leader) and his obligation to duchen, especially in the absence of other Kohanim. This necessitates an examination of interrupting Shemoneh Esrei.
• Disqualifying Factors for a Kohen: A comprehensive list of physical, moral, and ritual impediments that prevent a Kohen from duchening, and the nuances of each. This includes physical deformities, moral failings, ritual impurity, and certain marital statuses.

Nafka Minas (Practical Ramifications)

• Interrupting Shemoneh Esrei: The most significant nafka mina revolves around whether a Kohen must interrupt his Shemoneh Esrei to duchen. This hinges on the perceived severity of the mitzvah of Birkat Kohanim versus the sanctity of Shemoneh Esrei.
• "Broken-in" (מוחזק) Kohen: The practical application of a Kohen being "known" or "broken-in" in his city to override certain disqualifications (e.g., physical defects). This impacts who may duchen in various communities.
• Kohen-Chazan's Role: Determines the halachic procedure for a Kohen-Chazan, especially when he is the sole Kohen present.
• Impact of Repentance (תשובה): Whether teshuva can nullify disqualifications arising from past transgressions (e.g., killing, apostasy, tumah).
• Ashkenazi vs. Sefardi Practice: The Rama's glosses highlight significant differences in minhag (custom) regarding the frequency of Birkat Kohanim (e.g., only on Yom Tov in Ashkenaz).

Primary Sources

• Shulchan Arukh, Orach Chayim 128:28-30: The foundational text under analysis.
• Talmud Bavli:
  • Ketubot 24b: Source for the prohibition of a non-Kohen duchening.
  • Shabbat 16a (Tosafot "Kol Kitvei"): Discusses the nature of the prohibition for a non-Kohen.
  • Sotah 38b (Tosafot "Kol Yisrael"): Discusses a Kohen becoming tameh for Birkat Kohanim, a key reference for the Magen Avraham.
  • Megillah 2b (Ran, Hagahot Maimoni): Details various halachot of Birkat Kohanim, including the Kohen-Chazan.
  • Brachot 2b (Agudah "Haya Koreh"): Pertaining to the custom of not touching shoes after duchening.
  • Sanhedrin 7a (Mordechai "Nigmar Ha-din"): Regarding a Kohen whose daughter committed zenut.
• Rishonim/Acharonim:
  • Rashi, Tosafot, Ran, Rambam, Tur, Rosh, Mordechai, Rashba, Radvaz, Agur, Beit Yosef: Frequently cited within the S.A. and its glosses, forming the basis of the halacha.
  • Magen Avraham 128:40: Pivotal for understanding the chiyuv to interrupt Shemoneh Esrei.
  • Ba'er Hetev 128:47: Clarifies bal tosif and repeated Birkat Kohanim.
  • Mishnah Berurah 128:106: Expands on the Magen Avraham and introduces a machloket regarding interruption.
  • Levushei Serad 128:38: Defends the Magen Avraham's kal v'chomer.
  • Kaf HaChayim 128:163-164: Summarizes various positions.
  • Ginat V'radim, Zera Avraham, Aruch HaShulchan (implied by Eliyah Rabbah), Yaavetz (in his Siddur): Later authorities referenced for their views on key points.

Text Snapshot

The relevant sections from Shulchan Arukh, Orach Chayim 128:28-30 are:

Shulchan Arukh, Orach Chayim 128:28 כהן שנשא כפיו ואחר כך הלך לבית הכנסת אחרת ומצא שהצבור לא הגיעו עדיין לברכת כהנים, יכול לישא את כפיו פעם אחרת.

Shulchan Arukh, Orach Chayim 128:29 כהן שלא התפלל ומצא צבור שמתפללים, יכול לישא כפיו ואין תפלתו מעכבת.

Shulchan Arukh, Orach Chayim 128:30 הש"ץ שהוא כהן – אם יש שם כהנים אחרים, אינו נושא כפיו. הגה: (ולא יאמרו לו שיעלה ויטול ידיו, אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה) (מרדכי פ' הקורא עומד והג"מ פט"ו מתפלה ואגור). ואפילו אין שם כהן אלא הוא, אינו נושא כפיו אלא אם כן מובטח שלא תטרף דעתו לחזור לתפלתו, דאם מובטח בזה – כיון דליכא כהן אלא הוא, נושא כפיו כדי שלא תתבטל נשיאת כפים. וכיצד יעשה? עוקר רגליו קצת בעבודה, וממשיך להתפלל עד ולך נאה להודות, ואז עולה לדוכן ומברך נשיאת כפים, ואחר קורא לו, והוא משלים שים שלום. אבל אם הקורא מכוון בתפלת הש"ץ מתחלה ועד סוף, מוטב שישלים הקורא שים שלום.

Dikduk/Leshon Nuance

• סעיף כח' (Se'if 28): "יכול לישא את כפיו פעם אחרת." The term "יכול" (may) implies permission rather than obligation. This is crucial for the discussion of bal tosif and the extent of the Kohen's chiyuv. The Ba'er Hetev and Kaf HaChayim on this s'if explicitly state "אבל חיובא ליכא" (but there is no obligation).
• סעיף כט' (Se'if 29): "יכול לישא כפיו ואין תפלתו מעכבת." Here, "יכול" again indicates permission. The phrase "אין תפלתו מעכבת" (his prayer does not impede him) implies that the chiyuv of Birkat Kohanim takes precedence over the chiyuv of tefillah (personal Shemoneh Esrei) at that moment, or at least does not prevent him from duchening. This sets the stage for the Kohen-Chazan sugya where the tefillah is ongoing.
• סעיף ל' (Se'if 30): This s'if is a dense thicket of halachic and linguistic complexities.
  • "אם יש שם כהנים אחרים, אינו נושא כפיו." This is the baseline: a Kohen-Chazan does not duchen if other Kohanim are present. This avoids unnecessary interruption and maintains the chazan's primary role.
  • הגה (Gloss by Rama): "(ולא יאמרו לו שיעלה ויטול ידיו, אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה)." This Rama is a critical chiddush. The Rama argues that if the Kohen-Chazan is specifically called upon ("אמרו לו"), he must go up, even if other Kohanim are present, because otherwise "עובר על עשה" (he violates a positive commandment). This elevates the specific call to a chiyuv yachid (individual obligation), potentially overriding the usual protocol. The Magen Avraham leverages this Rama for his wider chiddush.
  • "אלא אם כן מובטח שלא תטרף דעתו לחזור לתפלתו." This phrase highlights the profound concern for kavanah (intention/focus) in Shemoneh Esrei. The Kohen-Chazan may only duchen if he is certain his mind will not be confused when he returns to his prayer. This is a significant caveat, placing the burden of self-assessment on the Kohen. "מובטח" (certain/assured) is a high bar.
  • "עוקר רגליו קצת בעבודה...וממשיך להתפלל עד ולך נאה להודות." This intricate procedure for the Kohen-Chazan who does duchen demonstrates how Chazal sought to minimize the interruption of Shemoneh Esrei. "עוקר רגליו קצת" (uproots his feet a little) is a symbolic act, signifying a mental shift towards Birkat Kohanim without fully abandoning Shemoneh Esrei. The continuation "עד ולך נאה להודות" indicates a specific point in the prayer (the end of Modim) where the interruption is less disruptive.
  • "ואחר קורא לו, והוא משלים שים שלום." The Kohen-Chazan does not prompt himself, and the chazan (now a Kohen on the duchan) completes "Sim Shalom" after duchening. This implies a specific structure to reintegrate the Birkat Kohanim into the Shemoneh Esrei repetition. The Rama's gloss at the end of the s'if offers an alternative: "מוטב שישלים הקורא שים שלום" (it is better for the caller to complete "Sim Shalom") if the caller had kavanah with the chazan's prayer. This suggests a preference for the shaliach tzibbur (prayer leader's agent) to maintain continuity.

These linguistic nuances underscore the delicate balance between various mitzvot, the demands of communal prayer, and the sanctity of individual prayer, all within the framework of Birkat Kohanim.

Readings

The sugya concerning a Kohen's obligation to duchen, particularly when already engaged in Shemoneh Esrei, has spawned a fascinating and intricate lomdus among the Rishonim and Acharonim. The core tension lies between the chiyuv of Birkat Kohanim and the severe prohibition against interrupting Shemoneh Esrei.

Magen Avraham 128:40: The Compelling Obligation to Interrupt

The Magen Avraham (Rabbi Avraham Gombiner, d. 1683), in his commentary on Shulchan Arukh 128:40, presents a groundbreaking chiddush that fundamentally shifts the understanding of a Kohen's obligation. While the Shulchan Arukh (128:30) states that a Kohen-Chazan with other Kohanim present does not duchen, and only must do so if he's the only Kohen and won't get confused, the Rama's gloss adds a critical caveat: "אבל אם אמרו לו [לעלה ויטול ידיו], חייב לעלות, דעובר על עשה אם אינו עולה" (But if they told him [to go up and wash his hands], he is obligated to go up, for he violates a positive commandment if he does not go up).

The Magen Avraham seizes upon this Rama and extends its principle. He argues that this chiyuv to ascend when called, even if other Kohanim are present, is so potent that it mandates interrupting Shemoneh Esrei. His reasoning is built on several layers:

1. Nature of the Chiyuv: The Magen Avraham understands the Rama's phrase "עובר על עשה" not merely as a general mitzvah for Kohanim to bless, but as an individual obligation (חיוב יחיד) that falls upon any eligible Kohen present when the tzibbur requires the blessing, especially when explicitly called. This elevates the mitzvah from a collective duty to a personal imperative in such circumstances.
2. Comparison to Kriat Shema for Aliyah (קל וחומר): The Magen Avraham draws a kal v'chomer (a fortiori argument) from a seemingly less stringent case. He notes that some Rabbis permit interrupting Kriat Shema (which is d'Oraita, a Torah-level obligation) to accept an aliyah to the Torah, even though accepting the aliyah is primarily a matter of kavod ha'Kohen (honor of the Kohen) and not a mitzvah aseh incumbent upon him in the same way Birkat Kohanim is. The interruption for aliyah is also significant, as Kriat HaTorah is a distinct practice from Kriat Shema.
   • If one may interrupt Kriat Shema for a mere kavod, then surely one may interrupt Shemoneh Esrei (which is d'Rabbanan by some opinions, or at least less stringent regarding interruption than Kriat Shema in certain contexts) for Birkat Kohanim, which is a mitzvah aseh upon the Kohen.
   • He articulates this comparison by highlighting that the aliyah for Kriat Shema is not a direct mitzvah on the Kohen that he violates by not going up. Yet, even in that case, some permit interruption. In contrast, Birkat Kohanim involves a clear violation of a mitzvah aseh if the Kohen refuses when called. Furthermore, Birkat Kohanim is "incorporated" within Shemoneh Esrei (in the R'tzei/Modim section), making it less of a disconnected interruption than an aliyah during Kriat Shema.
3. Proof from Tosafot Sotah 38b: The Magen Avraham buttresses his argument with a powerful proof from Tosafot in Sotah 38b. Tosafot there discuss whether a Kohen should perform Birkat Kohanim if it involves becoming tameh met (ritually impure from a corpse), which is a d'Oraita prohibition for Kohanim. The mere fact that Tosafot entertains such a discussion – whether one d'Oraita (Birkat Kohanim) can override another d'Oraita (tumah) – implies the immense weight and chiyuv of Birkat Kohanim. If the mitzvah of Birkat Kohanim is so strong that it could potentially override even a Lo Ta'aseh (negative commandment) from the Torah, then it certainly should justify interrupting Shemoneh Esrei, which is generally considered a d'Rabbanan or, at least, subject to d'Rabbanan rules regarding interruption. This kal v'chomer is not explicitly stated as such by the Magen Avraham, but it is the logical inference: if Birkat Kohanim has such chashivut (importance) that it could even involve violating a Lo Ta'aseh, then interrupting Shemoneh Esrei for it is a fortiori permissible.

In sum, the Magen Avraham's chiddush is that when a Kohen is explicitly called to duchen, the mitzvah aseh becomes a personal, compelling obligation that overrides the sanctity of Shemoneh Esrei, demanding an interruption.

Mishnah Berurah 128:106: Elaboration and the Counter-Argument

The Mishnah Berurah (Rabbi Yisrael Meir Kagan, the Chofetz Chaim, d. 1933) in 128:106, thoroughly unpacks the Magen Avraham's position and provides further clarification, while also introducing a crucial counter-argument.

1. Repeating Birkat Kohanim and Bal Tosif: The Mishnah Berurah begins by affirming the S.A.'s ruling (128:28) that a Kohen may duchen multiple times in a day. He reiterates the principle that "ליכא בל תוסיף בעשיית המצוה שתי פעמים" (there is no bal tosif in performing the mitzvah twice). The prohibition of bal tosif applies to adding to the form or number of mitzvot in a general sense, not to performing an existing mitzvah multiple times when the opportunity arises (e.g., lulev for multiple days, or tzitzit on multiple garments). Each act of Birkat Kohanim for a tzibbur is a distinct mitzvah. He further notes (citing Mishnah Berurah 128:11) that even when duchening multiple times, the Kohen recites the beracha "אשר קדשנו ב"ו וכו'" each time.
2. Interrupting Shemoneh Esrei - Reinforcing the Magen Avraham: The Mishnah Berurah then delves into the Kohen-Chazan sugya from S.A. 128:30. He explicitly states that if there is no other Kohen, the Kohen-Chazan must interrupt his Shemoneh Esrei to duchen, lest Birkat Kohanim be nullified. After duchening, he returns to complete his tefillah.
   • Crucially, he reiterates the Magen Avraham's chiddush: "ואם יש שם כהן אחר אינו פוסק מתפלתו אם לא שאמרו לו עלה לדוכן או טול ידיך דאז אפילו יש שם כהנים אחרים צריך להפסיק ולעלות." (If there is another Kohen, he does not interrupt his prayer, unless they tell him to go up to the platform or wash his hands, in which case, even if there are other Kohanim, he must interrupt and go up.) This confirms the Magen Avraham's interpretation of the Rama's gloss as an imperative to interrupt.
3. The Aruch HaShulchan / Yaavetz Counter-Argument: The Mishnah Berurah then introduces a significant dissenting opinion: "אמנם הא"ר מפקפק בעיקר היתר זה של הפסק באמצע התפלה אפילו באמרו לו עלה דאע"ג דתפלה דרבנן היא מ"מ אפשר דהעמידו חכמים דבריהם אפילו במקום עשה וכן דעת הגאון יעב"ץ בסידורו שלא להפסיק באמצע התפלה לנ"כ כשעומד בברכה אחרת אם לא שהגיע בתפלתו למקום ברכת כהנים שאז דעתו שמותר לו לעקור רגליו ולעלות לדוכן שבמקום זה לא מקרי הפסק שהוא מעין שים שלום." (However, the Eliyah Rabbah [Rabbi Eliyahu Shapiro, d. 1712, a contemporary of the Magen Avraham and Taz, often cited by the Mishnah Berurah] expresses doubt about this fundamental permission to interrupt in the middle of tefillah, even if he is told to go up. For even though tefillah is d'Rabbanan, it is possible that Chazal strengthened their words even in a place of mitzvah aseh. This is also the opinion of the Gaon Yaavetz [Rabbi Yaakov Emden, d. 1776] in his Siddur, that one should not interrupt in the middle of tefillah for Birkat Kohanim when standing in another beracha, unless he has reached the place of Birkat Kohanim in his prayer, at which point he is of the opinion that it is permissible to uproot his feet and go up to the duchan, for at that point it is not considered an interruption, as it is related to Sim Shalom.)
   • This is a profound machloket. The Eliyah Rabbah and Yaavetz argue that the sanctity and stringency of Shemoneh Esrei, even if d'Rabbanan, might be so great that Chazal prohibited its interruption even for a mitzvah aseh. They suggest that Chazal "strengthened their words" (העמידו חכמים דבריהם) to prevent any interruption. The Yaavetz offers a partial leniency: if the Kohen-Chazan has reached the beracha of R'tzei (where Birkat Kohanim is traditionally inserted), the interruption is less severe because it's conceptually linked to that part of the tefillah.
4. Condition of "מובטח שלא תטרף דעתו": The Mishnah Berurah concludes by emphasizing the S.A.'s critical condition: "וגם זה דוקא אם הוא מובטח שלא תטרף דעתו ויחזור לתפלתו ובלא"ה אסור בכל גווני להפסיק בתפלה זהו תוכן דבריו שם ע"ש" (And this is only if he is certain that his mind will not be confused and he will return to his prayer; otherwise, it is forbidden to interrupt tefillah in any case). This caveat applies to all scenarios where interruption is considered, even where technically permissible.

The Mishnah Berurah thus presents the Magen Avraham's position as the stama d'gemara (unqualified ruling) but immediately counters with the stringent view of the Eliyah Rabbah and Yaavetz, reflecting a significant machloket l'maaseh.

Levushei Serad 128:38: Defending the Magen Avraham's Kal V'Chomer

The Levushei Serad (Rabbi David Shlomo Eibeschutz, d. 1813), in his commentary on the Magen Avraham 128:38, directly engages with the Magen Avraham's kal v'chomer regarding interrupting Kriat Shema for an aliyah versus Shemoneh Esrei for Birkat Kohanim. The Eliyah Rabbah (cited by the Mishnah Berurah) and others raised a kushya: Shemoneh Esrei is generally considered more stringent regarding interruption than Kriat Shema. How can the Magen Avraham prove from a lenient case (Kriat Shema) to a more stringent one (Shemoneh Esrei)?

The Levushei Serad defends the Magen Avraham by meticulously explaining the nuances of the comparison:

1. Distinguishing Kriat Shema and Shemoneh Esrei Interruptions: He acknowledges the general rule that Shemoneh Esrei is indeed more stringent to interrupt than Kriat Shema (see O.C. 104:7). However, he argues that the Magen Avraham's comparison is not a simple one of general stringency, but rather a contextual one.
2. The Nature of the Interruption and the Mitvah:
   • For Kriat Shema and Aliyah: The aliyah is primarily for the kavod of the Kohen, and the act of Kriat HaTorah is distinct from Kriat Shema. The Magen Avraham himself noted that there is no disrespect if the Kohen doesn't go up when reading Shema. Yet, some poskim still permit interruption. This demonstrates that even for a "lesser" reason (honor) and a "greater" interruption (disconnected mitzvah), some allow it.
   • For Shemoneh Esrei and Birkat Kohanim: Here, the stakes are much higher. The Kohen violates a mitzvah aseh if he doesn't duchen when called. Furthermore, Birkat Kohanim is integrated into the Shemoneh Esrei repetition (specifically around R'tzei and Modim), making the interruption less jarring or "disconnected" than an aliyah during Kriat Shema. The Levushei Serad states: "דכיון דבקראוהו לתורה פוסק בק"ש מסתברא דבנ"כ דחמיר דעובר בעשה ותו דבנ"כ שייכא לתפלה ולא הוי כ"כ הפסק פוסק גם בתפלה" (Since for aliyah to the Torah one interrupts Kriat Shema, it is logical that for Birkat Kohanim, which is more severe as one violates a mitzvah aseh, and furthermore Birkat Kohanim is related to tefillah and not such a great interruption, one also interrupts in tefillah).
3. The Levushei Serad's Defense:* He synthesizes these points: The Magen Avraham's kal v'chomer is not about the general stringency of Shemoneh Esrei versus Kriat Shema for any interruption. Rather, it is about the relative weight of the reason for interruption versus the degree of interruption. For Birkat Kohanim, the reason is a chiyuv aseh and the interruption is relatively "internal" to the tefillah. For aliyah, the reason is kavod and the interruption is more "external." If Chazal permitted the latter, then the former is certainly permissible. He frames the Magen Avraham's argument as: even if Shemoneh Esrei is generally more stringent, the specific case of Birkat Kohanim presents a confluence of factors (violation of mitzvah aseh, integration into tefillah) that makes interruption permissible, and the Kriat Shema case provides a valid analogy to demonstrate this principle.

Thus, the Levushei Serad provides a robust defense of the Magen Avraham's kal v'chomer, clarifying that the comparison is not about the absolute stringency of the prayers themselves, but the dynamic interplay between the obligation to interrupt and the nature of the interruption.

Ba'er Hetev 128:47 / Kaf HaChayim 128:164: No Chiyuv for Repetition

The Ba'er Hetev (Rabbi Yehudah Ashkenazi, d. 1770) and Kaf HaChayim (Rabbi Yaakov Chaim Sofer, d. 1939) both elaborate on the first part of S.A. 128:28, which states that a Kohen who has already duchened may do so again in a different synagogue.

• Ba'er Hetev 128:47: "דליכא בל תוסיף בעשיית המצוה ב' פעמים אבל אין בו חיוב אפילו אם הוא בבה"כ כשקורין כהנים כיון שכבר נשא כפיו פעם אחת." (For there is no bal tosif in performing the mitzvah twice, but there is no obligation upon him, even if he is in the synagogue when they call Kohanim, since he has already raised his hands once).
• Kaf HaChayim 128:164: Similarly states: "אבל חיובא ליכא ואפי' אמרו לו לעלות אינו עובר כמ"ש לעיל בסעי' ג'." (But there is no obligation, and even if they tell him to go up, he does not violate [a commandment], as stated above in s'if 3).

Their chiddush is one of clarification: while the S.A. says "יכול לישא את כפיו" (he may raise his hands), these Acharonim explicitly state that there is no obligation (אין בו חיוב) to do so a second time. This is a critical distinction. The mitzvah of Birkat Kohanim is a mitzvah aseh incumbent upon Kohanim to bless Klal Yisrael. Once a Kohen has fulfilled this mitzvah for Klal Yisrael on a given day, he has discharged his personal obligation. Subsequent opportunities to duchen, while permissible and even laudable, do not carry the same weight of chiyuv yachid that would, for instance, compel an interruption of Shemoneh Esrei.

This perspective provides a counterpoint to the Magen Avraham's stringent view. The Magen Avraham's argument for interrupting Shemoneh Esrei relies on the Rama's gloss that if a Kohen is told to go up, he violates an aseh if he refuses. The Ba'er Hetev and Kaf HaChayim, by stating that there's no chiyuv for a second duchening even if told, imply that the Rama's "עובר על עשה" applies only to a Kohen who has not yet duchened at all that day. If he has already duchened, the mitzvah aseh has been fulfilled, and any subsequent call, while an opportunity, is not a chiyuv that would necessitate such an extreme measure as interrupting Shemoneh Esrei. This subtle distinction highlights the conditional nature of the "עובר על עשה" phrase, limiting its application to the initial performance of the mitzvah for the day.

Friction

The sugya presents several points of friction, where various halachic principles clash, leading to rigorous debate among poskim. We'll focus on two primary kushyot with their corresponding terutzim.

Kushya 1: Interrupting Shemoneh Esrei for Birkat Kohanim

The most significant kushya in this sugya revolves around the Kohen-Chazan and the instruction to interrupt Shemoneh Esrei for Birkat Kohanim.

The Problem: The Shulchan Arukh (O.C. 128:30) states that a Kohen-Chazan doesn't duchen if other Kohanim are present. However, the Rama's gloss adds: "אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה" (But if they told him, he is obligated to go up, for he violates a positive commandment if he does not go up). The Magen Avraham (128:40) then extends this, arguing that this chiyuv is so strong it necessitates interrupting Shemoneh Esrei. This is profoundly difficult. Shemoneh Esrei is the pinnacle of prayer, with stringent rules against interruption. The general halacha (O.C. 104:7) forbids interrupting Shemoneh Esrei even for significant reasons, except for pikuach nefesh (saving a life) or to rectify an error in the prayer itself. How can a mitzvah aseh of Birkat Kohanim, which might even be considered a mitzvah d'Rabbanan in its current form (due to galut and lack of Beis HaMikdash), justify interrupting Shemoneh Esrei, which is d'Oraita according to many, or at least has the stringency of d'Oraita by d'Rabbanan decree? This tension between the chiyuv of Birkat Kohanim and the sanctity of Shemoneh Esrei is sharp.

Terutz 1: The Magen Avraham's Unqualified Obligation

The Magen Avraham resolves this kushya by elevating the chiyuv of Birkat Kohanim when a Kohen is called. He maintains that:

1. Birkat Kohanim is a Mitzvah Aseh on the Kohen: The Rama's language "עובר על עשה" is taken literally. This isn't just a communal mitzvah; it becomes a personal obligation on the individual Kohen when he is present and called. The Chazal did not intend for a mitzvah aseh to be nullified by the d'Rabbanan (or d'Oraita with d'Rabbanan rules) prayer of Shemoneh Esrei.
2. Comparison to Less Stringent Interruptions: The Magen Avraham's kal v'chomer from Kriat Shema for an aliyah is pivotal here. As discussed in the "Readings" section, if one can interrupt Kriat Shema (d'Oraita) for a kavod (honor) related aliyah, then a fortiori one can interrupt Shemoneh Esrei (d'Rabbanan in its current form, or less stringent than Kriat Shema regarding specific types of interruptions) for a direct mitzvah aseh that would otherwise be violated. The Levushei Serad (128:38) defends this kal v'chomer by highlighting that Birkat Kohanim is "shiyacha l'tefillah" (related to the prayer) and thus less of a foreign interruption compared to Kriat HaTorah during Kriat Shema.
3. Proof from Tosafot Sotah: The Magen Avraham also points to Tosafot Sotah 38b, which debates whether a Kohen should become tameh met (violating a Lo Ta'aseh d'Oraita) to perform Birkat Kohanim. If Birkat Kohanim can be considered weighty enough to potentially override a Lo Ta'aseh d'Oraita, it certainly can override the prohibition of interrupting Shemoneh Esrei. The Tosafot there indeed suggest that Birkat Kohanim is a mitzvah rabba (great mitzvah), and its chashivut is immense.

Essentially, the Magen Avraham argues that the chiyuv of Birkat Kohanim is of such a high order, especially when it becomes a chiyuv yachid upon being called, that it trumps the general prohibition of interrupting Shemoneh Esrei. The mitzvah of blessing Israel is a direct command from God, and its fulfillment takes precedence.

Terutz 2: The Aruch HaShulchan / Yaavetz's Stringent View (as cited by Mishnah Berurah)

A significant counter-argument, cited by the Mishnah Berurah (128:106) from the Eliyah Rabbah and Yaavetz, takes a more stringent stance:

1. "He'emidu Chachamim Divreihem": This view posits that even if Shemoneh Esrei is d'Rabbanan, Chazal "strengthened their words" (העמידו חכמים דבריהם) regarding its non-interruption. This means that even a mitzvah aseh d'Oraita might not be sufficient to justify an interruption, because Chazal deliberately placed a high barrier to preserve the sanctity and flow of Shemoneh Esrei. The fear is that if exceptions are made, the entire structure of prayer could unravel.
2. Specific Context for Interruption: The Yaavetz offers a nuanced concession: interruption might be permissible only if the Kohen-Chazan has reached the part of his own Shemoneh Esrei where Birkat Kohanim is integrated into the communal prayer (i.e., around R'tzei / Modim). At this point, the act of "uprooting his feet" is not a complete interruption but a shift within a related segment of prayer, hence "לא מקרי הפסק שהוא מעין שים שלום" (it is not considered an interruption, as it is related to Sim Shalom). This suggests that the chiyuv of Birkat Kohanim can only override the prayer's continuity when the interruption is minimal and contextually appropriate.
3. The "מובטח" (Certainty) Condition: Both the S.A. and the Mishnah Berurah emphasize the condition "מובטח שלא תטרף דעתו" (certain that his mind will not be confused). This condition is a sine qua non for any interruption. Even if the halachic justification for interruption exists, if the Kohen feels he will lose his kavanah and be unable to resume his prayer coherently, he must not interrupt. This highlights the subjective element and the paramount importance of kavanah in Shemoneh Esrei.

This machloket reflects a fundamental disagreement on the hierarchy of mitzvot and the extent to which Chazal's enactments can impact d'Oraita obligations. The Magen Avraham prioritizes the direct mitzvah aseh when called, while the Eliyah Rabbah and Yaavetz prioritize the integrity and sanctity of Shemoneh Esrei as established by Chazal.

Kushya 2: "Bal Tosif" and Repeating Birkat Kohanim

The Problem: Shulchan Arukh O.C. 128:28 states: "כהן שנשא כפיו ואחר כך הלך לבית הכנסת אחרת... יכול לישא את כפיו פעם אחרת" (A Kohen who raised his hands and afterwards went to another synagogue... may raise his hands once again). This permission to repeat Birkat Kohanim seems to run headlong into the prohibition of Bal Tosif (Do not add), derived from Devarim 4:2, which states "לא תספו על הדבר אשר אנכי מצוה אתכם ולא תגרעו ממנו לשמר את מצות ה' אלקיכם" (You shall not add to the word which I command you, nor shall you subtract from it, to keep the commandments of the LORD your God). If Birkat Kohanim is a mitzvah, performing it a second time in the same day appears to be "adding" to the mitzvah, or performing it beyond its prescribed bounds.

Terutz 1: Bal Tosif Does Not Apply to Repetition of the Mitzvah

The standard terutz, articulated by the Ba'er Hetev (128:47), Mishnah Berurah (128:106), and Kaf HaChayim (128:163), is that Bal Tosif is not applicable in this context. Their reasoning is based on a foundational understanding of Bal Tosif:

1. Nature of Bal Tosif: Bal Tosif prohibits adding a new element to a mitzvah (e.g., five species for lulav instead of four), or creating a new mitzvah entirely. It does not prohibit performing an existing mitzvah multiple times when the opportunity arises.
2. Each Performance is a New Instance: Each performance of Birkat Kohanim before a tzibbur is considered a distinct fulfillment of the mitzvah. The mitzvah is to bless Klal Yisrael. If a Kohen encounters a different tzibbur, or even the same tzibbur at a later prayer service (e.g., Shacharit and Musaf), and they require the blessing, it constitutes a new instance where the mitzvah can be performed. It's not "adding" to the mitzvah of Birkat Kohanim (e.g., by adding a fourth verse to the blessing), but rather performing the same mitzvah again for a new audience or occasion.
3. Benefit to Klal Yisrael: The blessing benefits Klal Yisrael. Each tzibbur that receives the blessing gains from it. Therefore, a Kohen who blesses multiple times is not adding to the mitzvah itself, but rather extending its benefit and fulfilling it for more people or at different times. The Kaf HaChayim (128:163) explicitly notes that the Kohen recites the blessing "אשר קדשנו ב"ו וכו'" each time he performs Birkat Kohanim, indicating that each instance is a complete, independent fulfillment.

This terutz aligns with the general halachic principle that many mitzvot can be repeated if the conditions for their performance are met again. For example, one who eats matzah at multiple sedarim in different locations is not violating Bal Tosif. The mitzvah is to eat matzah at the seder. If one is at multiple sedarim, one repeats the mitzvah. Similarly, the mitzvah of Birkat Kohanim is to bless Klal Yisrael at the appropriate time in tefillah. If a Kohen finds himself in multiple such situations, he may perform the mitzvah each time.

Intertext

The sugya of Birkat Kohanim in S.A. O.C. 128:28-30 is deeply interwoven with various other foundational texts in Jewish law and thought. Its complexities often find parallels and resolutions by drawing on broader halachic principles.

1. Tanakh: Devarim 4:2 and 13:1 (Bal Tosif)

The prohibition of Bal Tosif (Do not add) is a cornerstone of Torah law, articulated in Devarim 4:2 and reiterated in 13:1. It ensures the integrity and divine origin of the mitzvot. The Shulchan Arukh (128:28) permits a Kohen to perform Birkat Kohanim multiple times in a day if he encounters different congregations. This immediately raises the specter of Bal Tosif.

The resolution, as clarified by Magen Avraham, Ba'er Hetev, and Mishnah Berurah, hinges on the precise definition of Bal Tosif. The Sefer HaChinuch (Mitzvah 454) explains that Bal Tosif applies to adding a new element to a mitzvah (e.g., five minim for lulav instead of four) or creating a new mitzvah entirely. It does not forbid performing an existing mitzvah multiple times when the opportunity arises. For instance, one who dons tefillin multiple times a day, or eats matzah at multiple sedarim, does not violate Bal Tosif. The mitzvah of Birkat Kohanim is to bless the people Israel. Each distinct congregation at each distinct prayer service constitutes a separate opportunity to fulfill this mitzvah. The Kohen is not adding to the form of the blessing or creating a new requirement; rather, he is fulfilling the same mitzvah anew for a different instance. This interpretation is crucial for understanding the flexibility within halacha regarding repeated mitzvot.

2. Gemara Megillah 22a and Sotah 38b (Birkat Kohanim Requirements)

Many of the procedural halachot detailed in S.A. 128 (e.g., standing, loud voice, holy language, specific hand gestures) are rooted in the Gemara. Megillah 22a discusses the proper performance of Birkat Kohanim, emphasizing the need for a minyan and the Kohen being part of it. Sotah 38b is particularly rich, elaborating on the requirements for the Kohen, the tzibbur, and the blessings.

• Requirements for the Kohen: Sotah 38b enumerates various disqualifying factors, many of which are codified in S.A. 128:30-45. These include physical defects (e.g., "bohakniyot," "akumot," "akushot" – a Kohen with spotted, crooked, or bent hands), moral failings (e.g., a murderer, an apostate, one who married a divorcée), and ritual impurity. The Gemara's concern is that any defect that causes the congregation to stare at the Kohen distracts from the kavanah of the blessing. The S.A.'s allowance for a "broken-in" Kohen or one who drapes a tallit over his face directly addresses these Gemara concerns.
• The Tosafot in Sotah 38b: This Tosafot is directly referenced by the Magen Avraham (128:40) in his argument for interrupting Shemoneh Esrei. The Tosafot discusses whether a Kohen should duchen if it involves becoming tameh met (ritually impure from a corpse), which is a d'Oraita prohibition. The very fact that Tosafot entertains this sha'ala (question) – whether a mitzvah aseh of Birkat Kohanim could override a Lo Ta'aseh d'Oraita of tumah – underscores the immense chashivut (importance) and compelling nature of Birkat Kohanim. If it could potentially override a d'Oraita prohibition, then interrupting Shemoneh Esrei (which is d'Rabbanan or has d'Rabbanan stringencies) becomes more readily understandable.

3. Rambam Hilchot Tefillah 15:8 (Kohen-Chazan Protocol)

The Rambam (Maimonides, Rabbi Moshe ben Maimon, d. 1204) in Hilchot Tefillah 15:8 provides a foundational perspective on the Kohen-Chazan scenario, which is partially quoted and built upon by the Shulchan Arukh 128:30. The Rambam states: "הש"ץ שהוא כהן, אינו עולה לדוכן, כדי שלא יפסיק מן התפלה, אם יש שם כהנים אחרים. אבל אם אין שם כהן אלא הוא, עולה לדוכן ומברך, כדי שלא תתבטל ברכת כהנים, וגומר תפלתו" (A prayer leader who is a Kohen does not ascend the platform, so as not to interrupt his prayer, if there are other Kohanim present. But if there is no other Kohen, he ascends the platform and blesses, so that Birkat Kohanim should not be nullified, and then he completes his prayer).

The Rambam emphasizes two key principles:

1. Minimizing Interruption: The primary concern is "כדי שלא יפסיק מן התפלה" (so as not to interrupt his prayer). This highlights the sanctity of Shemoneh Esrei.
2. Preventing Nullification of Birkat Kohanim: If he is the only Kohen, the value of "כדי שלא תתבטל ברכת כהנים" (so that Birkat Kohanim should not be nullified) takes precedence, justifying the interruption.

The Rambam's position forms the bedrock of S.A. 128:30. The Shulchan Arukh adds the crucial condition "מובטח שלא תטרף דעתו לחזור לתפלתו" (certain that his mind will not be confused to return to his prayer), which is absent in this specific Rambam but implied by the overall importance of kavanah in his Mishneh Torah. The Rama's gloss, compelling the Kohen-Chazan to duchen even if other Kohanim are present if called, is a later development (likely from Mordechai), adding a new layer of chiyuv yachid that goes beyond the Rambam's simpler framework.

4. Shulchan Arukh Orach Chayim 104:7 (General Rules for Interrupting Shemoneh Esrei)

The halachot of interrupting Shemoneh Esrei are meticulously detailed in S.A. O.C. 104:7. The general rule is extremely strict: "אין מפסיקין בתפלה אפילו לשאלת שלום" (One does not interrupt in prayer even for a greeting of peace). Exceptions are extremely rare and limited, such as pikuach nefesh (saving a life) or to prevent a major sin.

This general stringency is what makes the Magen Avraham's chiddush (permitting interruption for Birkat Kohanim when called) so radical and the Eliyah Rabbah's/ Yaavetz's counter-argument (that Chazal strengthened their words) so compelling. The Magen Avraham posits that the "עשה" (positive commandment) of Birkat Kohanim is a rare exception that can override the general rule. However, the Eliyah Rabbah suggests that the general rule's strictness is so absolute that it might even override some mitzvot aseh. This machloket highlights the tension between the individual chiyuv to perform a mitzvah and the communal halacha governing prayer, emphasizing the profound weight given to Shemoneh Esrei's integrity.

5. Responsa Literature: Radvaz and Ginat V'radim (Practical Applications)

Later poskim in responsa literature often grappled with the practical implications of these debates.

• Radvaz (Rabbi David ibn Zimra, d. 1573): The Magen Avraham himself (128:40) cites the Radvaz (Part 1, Siman 153) as a source for the idea that if a Kohen is duchening and there's no other Kohen, he should interrupt. The Radvaz is a critical early voice emphasizing the importance of preventing the nullification of Birkat Kohanim. His ruling provides a precedent for the idea that Birkat Kohanim can indeed necessitate an interruption, at least in the extreme case of no other Kohanim.
• Ginat V'radim (Rabbi Avraham Halevi, d. 1709) and Zera Avraham (Rabbi Avraham ben David, d. 1718): These Acharonim are cited by the Ba'er Hetev (128:47) in his discussion of repeating Birkat Kohanim. They support the idea that while one may repeat, there is no chiyuv to do so. Their responsa likely dealt with specific cases where Kohanim were unsure if they must duchen again, or if they had fulfilled their obligation. These poskim reinforce the distinction between permission and obligation, especially regarding mitzvot that can be repeated. This practical clarification, emerging from responsa, helps to define the limits of the Kohen's responsibility once the initial mitzvah is fulfilled for the day.

These intertextual connections demonstrate that the sugya of Birkat Kohanim is a microcosm of broader halachic principles, revealing the complex interplay between d'Oraita and d'Rabbanan, the sanctity of prayer, the obligation of mitzvot, and the role of minhag.

Psak/Practice

The halachot of Birkat Kohanim as presented in S.A. O.C. 128:28-30, especially with the Rama's glosses, reflect a dynamic interplay between foundational principles and diverse customs.

The Kohen's Obligation to Duchen

The basic psak is that any eligible Kohen in the synagogue, when "Kohanim" is called, has a mitzvah aseh to ascend the duchan and bless the congregation. If he refuses without a valid disqualification, he is considered to have violated a positive commandment (S.A. 128:2, Rama 128:30). However, if he has already duchened earlier that day, he is not obligated to duchen again, even if called, although he may do so (S.A. 128:28, Ba'er Hetev 128:47, Kaf HaChayim 128:164). This distinction between "may" and "must" is critical.

The Kohen-Chazan Dilemma

This is perhaps the most nuanced area.

• With Other Kohanim: If the chazan is a Kohen and other Kohanim are present, he generally does not duchen (S.A. 128:30). This is to avoid interrupting his Shemoneh Esrei. However, the Rama's gloss (128:30) introduces a chiddush: if he is explicitly called to duchen, he is obligated to go, as he would otherwise violate a mitzvah aseh. L'maaseh, many poskim are cautious about this, often instructing the gabbai not to call the Kohen-Chazan if other Kohanim are available, to avoid the dilemma.
• As the Sole Kohen: If the Kohen-Chazan is the only Kohen present, he must duchen, provided he is "מובטח שלא תטרף דעתו" (certain that his mind will not be confused) when he returns to his Shemoneh Esrei. The procedure involves "uprooting his feet" at R'tzei, continuing until "u'lekha na'eh l'hodot" (end of Modim), ascending, duchening, and then having someone else prompt him and complete Sim Shalom (S.A. 128:30). The Mishnah Berurah (128:106) reinforces this, but also cites the stricter view of the Eliyah Rabbah and Yaavetz that one should not interrupt Shemoneh Esrei at all unless it's at the Birkat Kohanim point in one's own Shemoneh Esrei. L'maaseh, the widespread custom leans towards the Magen Avraham's leniency for the sole Kohen if he is certain he won't get confused, but with a strong preference for avoiding the situation by having a non-Kohen chazan if possible, or by ensuring other Kohanim are present.

Disqualifying Factors and Repentance

The S.A. provides a long list of disqualifications (physical, moral, ritual).

• Physical Defects: Generally, a Kohen with a visible defect that would cause the congregation to stare is disqualified, unless he is "broken-in" (מוחזק) in that city (known to the community for 30+ days) or if the custom is to cover the face with a tallit and the hands are also covered (S.A. 128:39-41). The custom of covering with a tallit is widespread in many communities, effectively mitigating many physical disqualifications.
• Moral/Ritual Defects: For severe transgressions like killing, apostasy, or marrying a forbidden woman, the Kohen is disqualified. However, for some, teshuva (repentance) can restore eligibility. The Rama (128:34) states that regarding a Kohen who killed, "there is ground to be lenient regarding those who have repented, so as not to lock the door before them. And so is the custom." This reflects a meta-psak heuristic of encouraging repentance. For an apostate who repented, the S.A. (128:35) rules this is the primary halacha. However, a Kohen who married a divorcée (or other forbidden women) is disqualified until he divorces her and takes a public vow, reflecting the more permanent nature of these transgressions (S.A. 128:37).

Ashkenazi vs. Sefardi Custom

The Rama's gloss at the end of S.A. 128:44 notes a significant Ashkenazi custom: Birkat Kohanim is generally performed only on Yom Tov, and often specifically at Musaf, not on regular weekdays or even Shabbats, due to the Kohen's preoccupation with livelihood on other days, which hinders the necessary simcha (joy) and kavanah. In contrast, most Sefardi communities perform Birkat Kohanim daily. This is a prime example of minhag overriding a seemingly universal obligation, based on a sociological assessment of the Kohen's emotional state.

Meta-Psak Heuristics

1. Balancing Chiyuv Yachid and Kvod HaTzibbur: The sugya constantly balances the individual Kohen's chiyuv against the needs and reverence of the congregation, and the sanctity of prayer.
2. The Weight of Kavanah: The condition of "מובטח שלא תטרף דעתו" for the Kohen-Chazan underscores the paramount importance of kavanah in Shemoneh Esrei, even to the extent of overriding a mitzvah aseh if kavanah is compromised.
3. The Power of Minhag: The Ashkenazi custom regarding Yom Tov duchening demonstrates how firmly established minhagim can shape halachic practice, even for mitzvot d'Oraita, especially when tied to internal spiritual states like simcha.
4. Encouraging Teshuva: The leniency regarding repentant Kohanim who committed grave sins reflects a broader halachic principle of not "locking the door before those who repent."

Takeaway

The sugya of Birkat Kohanim is a profound lesson in the intricate balance of chiyuv, kavanah, and minhag, revealing how halacha meticulously navigates individual obligation against communal sanctity and the complexities of human spiritual states. It underscores that even mitzvot d'Oraita are performed within a context that considers psychological readiness and the integrity of other mitzvot.

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Footnotes:

• Ketubot, ch. 2, daf 24: Ketubot 24b.
• Tosafot in the chapter "Kol Kitvei" [Shabbat, ch. 16]: Shabbat 16a, s.v. "כל כתבי".
• Aguda, Chapter "HaKoreh et HaMegilla" [Megillah Chapter 2]: Agudah, Megillah 2b.
• Rashi, Tosefot, and the Ran...Beit Yosef]: Rashi on Sotah 39a, Tosafot on Sotah 38b, Ran on Megillah 22a, Beit Yosef O.C. 128.
• Tur in the name of R"i and the Rambam: Tur O.C. 128, citing Rosh (R"i) and Rambam (Hilchot Tefillah 15:8).
• Tur in the name of R"i and the R"m [Meir] of Rothenburg: Tur O.C. 128, citing Rosh and Maharam Rothenburg.
• Tur and the Ran - chapter "Hakoreh" [Talmud Megillah Chapter 2], and Hagahot Maimoni: Tur O.C. 128, Ran on Megillah 22a, Hagahot Maimoni on Rambam Hilchot Tefillah 15:10.
• Rashi - chapter "Eilu Ne'emarin" [Sotah, Chapter 7], and Hagahot Maimoni: Rashi on Sotah 39a, Hagahot Maimoni on Rambam Hilchot Tefillah 15:11.
• Agudah - chapter "Haya Koreh" [Brachot Chapter 2]: Agudah, Brachot 2b.
• Mordechai on chapter "Hakoreh Omed" [Megillah, Chapter 3]; Hagahot Maimoni - chapter 15 of the Laws of Prayers; Agur: Mordechai on Megillah 22a; Hagahot Maimoni on Rambam Hilchot Tefillah 15:8; Agur Siman 157.
• Mordechai in chapter "Nigmar Ha-din" [Chapter 6 of Sanhedrin]: Mordechai on Sanhedrin 7b (referring to Sanhedrin 7a).
• Mordechai at the end of chapter "Hakoreh Omed" [Chapter 4 of Megillah], and Hagahot Maimoni: Mordechai on Megillah 24a; Hagahot Maimoni on Rambam Hilchot Tefillah 15:10.
• Mordechai on Tractate Megillah chp. 4: Mordechai on Megillah 24a.
• Teshuvot Maharil - siman 148: Teshuvot Maharil Siman 148.
• Mordekhai, commentary to Tractate Gittin: Mordechai on Gittin 57a.
• Magen Avraham on Magen Avraham 128:40: Magen Avraham O.C. 128, sk. 40.
• Radvaz chelek 1 siman 153: Radvaz Vol. 1, Responsa 153.
• Rashba siman 185: Responsa Rashba Vol. 1, Responsa 185.
• Tosafot in Sotah: Tosafot on Sotah 38b, s.v. "כל ישראל".
• Ba'er Hetev on Shulchan Arukh, Orach Chayim 128:47: Ba'er Hetev O.C. 128, sk. 47.
• Tesu' Ginat V'radim כלל א' סי' י"ג. ובתשובת זרע אברהם חא"ח סי' י"ב: Ginat V'radim Clal 1, Siman 13; Zera Avraham O.C. Siman 12.
• Mishnah Berurah on Mishnah Berurah 128:106: Mishnah Berurah O.C. 128, sk. 106.
• A"R [Eliyah Rabbah] m'fakpek...Gaon Yaavetz b'siddur: Eliyah Rabbah O.C. 128, sk. 40; Yaavetz, Siddur Beit Yaakov, Birkat Kohanim.
• Be'er HaGolah on Be'er HaGolah on Shulchan Arukh, Orach Chayim 128:45: Be'er HaGolah O.C. 128, sk. 45. (This reference in the prompt is redundant as Be'er HaGolah only points to the preceding sources, adding no independent chiddush here).
• Kaf HaChayim on Kaf HaChayim on Shulchan Arukh, Orach Chayim 128:163:1: Kaf HaChayim O.C. 128, sk. 163.
• Kaf HaChayim on Kaf HaChayim on Shulchan Arukh, Orach Chayim 128:164:1: Kaf HaChayim O.C. 128, sk. 164.
• Levushei Serad on Levushei Serad on Shulchan Arukh, Orach Chayim 128:38: Levushei Serad O.C. 128, sk. 38.
• Devarim 4:2: Devarim 4:2.
• Devarim 13:1: Devarim 13:1 (in Jewish texts, this is 13:1, in some Christian translations it might be 12:32).
• Sefer HaChinuch, Mitzvah 454: Sefer HaChinuch, Mitzvah 454.
• Shulchan Arukh O.C. 104:7: Shulchan Arukh, Orach Chayim 104:7.
• Rambam Hilchot Tefillah 15:8: Rambam, Hilchot Tefillah u'Birkat Kohanim 15:8.
• Shulchan Arukh 128:2: Shulchan Arukh, Orach Chayim 128:2.
• Shulchan Arukh 128:39-41: Shulchan Arukh, Orach Chayim 128:39-41.
• Shulchan Arukh 128:34: Shulchan Arukh, Orach Chayim 128:34.
• Shulchan Arukh 128:35: Shulchan Arukh, Orach Chayim 128:35.
• Shulchan Arukh 128:37: Shulchan Arukh, Orach Chayim 128:37.
• Shulchan Arukh 128:44 (Rama): Shulchan Arukh, Orach Chayim 128:44 (Rama's gloss).## Sugya Map

The Shulchan Arukh, Orach Chayim 128:28-30, offers a kaleidoscopic view into the intricate halachot surrounding Birkat Kohanim, the Priestly Blessing. This section, far from a mere procedural guide, delves into the chiyuv (obligation) of the Kohen, the conditions for its performance, and the myriad factors that can render a Kohen disqualified or necessitate an interruption in prayer. The sugya is fundamentally about balancing the Divine mandate to bless with the practical realities of communal prayer and individual Kohen status.

Core Issues

• Kohen's Obligation to Duchen (ברכת כהנים): The s'ifim explore the nature of the Kohen's chiyuv to ascend the duchan (platform). Is it an absolute, constant obligation, or conditional? What constitutes a "forfeited" mitzvah?
• Repetition of Birkat Kohanim: Can a Kohen perform Birkat Kohanim more than once in a day? What is the halachic basis for this, particularly regarding Bal Tosif (the prohibition against adding to mitzvot)?
• Kohen-Chazan Protocol: The unique halachic conundrum of a Kohen serving as the chazan (prayer leader) and his obligation to duchen, especially in the absence of other Kohanim. This necessitates an examination of interrupting Shemoneh Esrei.
• Disqualifying Factors for a Kohen: A comprehensive list of physical, moral, and ritual impediments that prevent a Kohen from duchening, and the nuances of each. This includes physical deformities, moral failings, ritual impurity, and certain marital statuses.

Nafka Minas (Practical Ramifications)

• Interrupting Shemoneh Esrei: The most significant nafka mina revolves around whether a Kohen must interrupt his Shemoneh Esrei to duchen. This hinges on the perceived severity of the mitzvah of Birkat Kohanim versus the sanctity of Shemoneh Esrei.
• "Broken-in" (מוחזק) Kohen: The practical application of a Kohen being "known" or "broken-in" in his city to override certain disqualifications (e.g., physical defects). This impacts who may duchen in various communities.
• Kohen-Chazan's Role: Determines the halachic procedure for a Kohen-Chazan, especially when he is the sole Kohen present.
• Impact of Repentance (תשובה): Whether teshuva can nullify disqualifications arising from past transgressions (e.g., killing, apostasy, tumah).
• Ashkenazi vs. Sefardi Practice: The Rama's glosses highlight significant differences in minhag (custom) regarding the frequency of Birkat Kohanim (e.g., only on Yom Tov in Ashkenaz).

Primary Sources

• Shulchan Arukh, Orach Chayim 128:28-30: The foundational text under analysis.
• Talmud Bavli:
  • Ketubot 24b: Source for the prohibition of a non-Kohen duchening.
  • Shabbat 16a (Tosafot "Kol Kitvei"): Discusses the nature of the prohibition for a non-Kohen.
  • Sotah 38b (Tosafot "Kol Yisrael"): Discusses a Kohen becoming tameh for Birkat Kohanim, a key reference for the Magen Avraham.
  • Megillah 2b (Ran, Hagahot Maimoni): Details various halachot of Birkat Kohanim, including the Kohen-Chazan.
  • Brachot 2b (Agudah "Haya Koreh"): Pertaining to the custom of not touching shoes after duchening.
  • Sanhedrin 7a (Mordechai "Nigmar Ha-din"): Regarding a Kohen whose daughter committed zenut.
• Rishonim/Acharonim:
  • Rashi, Tosafot, Ran, Rambam, Tur, Rosh, Mordechai, Rashba, Radvaz, Agur, Beit Yosef: Frequently cited within the S.A. and its glosses, forming the basis of the halacha.
  • Magen Avraham 128:40: Pivotal for understanding the chiyuv to interrupt Shemoneh Esrei.
  • Ba'er Hetev 128:47: Clarifies bal tosif and repeated Birkat Kohanim.
  • Mishnah Berurah 128:106: Expands on the Magen Avraham and introduces a machloket regarding interruption.
  • Levushei Serad 128:38: Defends the Magen Avraham's kal v'chomer.
  • Kaf HaChayim 128:163-164: Summarizes various positions.
  • Ginat V'radim, Zera Avraham, Aruch HaShulchan (implied by Eliyah Rabbah), Yaavetz (in his Siddur): Later authorities referenced for their views on key points.

Text Snapshot

The relevant sections from Shulchan Arukh, Orach Chayim 128:28-30 are:

Shulchan Arukh, Orach Chayim 128:28 כהן שנשא כפיו ואחר כך הלך לבית הכנסת אחרת ומצא שהצבור לא הגיעו עדיין לברכת כהנים, יכול לישא את כפיו פעם אחרת.

Shulchan Arukh, Orach Chayim 128:29 כהן שלא התפלל ומצא צבור שמתפללים, יכול לישא כפיו ואין תפלתו מעכבת.

Shulchan Arukh, Orach Chayim 128:30 הש"ץ שהוא כהן – אם יש שם כהנים אחרים, אינו נושא כפיו. הגה: (ולא יאמרו לו שיעלה ויטול ידיו, אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה) (מרדכי פ' הקורא עומד והג"מ פט"ו מתפלה ואגור). ואפילו אין שם כהן אלא הוא, אינו נושא כפיו אלא אם כן מובטח שלא תטרף דעתו לחזור לתפלתו, דאם מובטח בזה – כיון דליכא כהן אלא הוא, נושא כפיו כדי שלא תתבטל נשיאת כפים. וכיצד יעשה? עוקר רגליו קצת בעבודה, וממשיך להתפלל עד ולך נאה להודות, ואז עולה לדוכן ומברך נשיאת כפים, ואחר קורא לו, והוא משלים שים שלום. אבל אם הקורא מכוון בתפלת הש"ץ מתחלה ועד סוף, מוטב שישלים הקורא שים שלום.

Dikduk/Leshon Nuance

• סעיף כח' (Se'if 28): "יכול לישא את כפיו פעם אחרת." The term "יכול" (may) implies permission rather than obligation. This is crucial for the discussion of bal tosif and the extent of the Kohen's chiyuv. The Ba'er Hetev and Kaf HaChayim on this s'if explicitly state "אבל חיובא ליכא" (but there is no obligation).
• סעיף כט' (Se'if 29): "יכול לישא כפיו ואין תפלתו מעכבת." Here, "יכול" again indicates permission. The phrase "אין תפלתו מעכבת" (his prayer does not impede him) implies that the chiyuv of Birkat Kohanim takes precedence over the chiyuv of tefillah (personal Shemoneh Esrei) at that moment, or at least does not prevent him from duchening. This sets the stage for the Kohen-Chazan sugya where the tefillah is ongoing.
• סעיף ל' (Se'if 30): This s'if is a dense thicket of halachic and linguistic complexities.
  • "אם יש שם כהנים אחרים, אינו נושא כפיו." This is the baseline: a Kohen-Chazan does not duchen if other Kohanim are present. This avoids unnecessary interruption and maintains the chazan's primary role.
  • הגה (Gloss by Rama): "(ולא יאמרו לו שיעלה ויטול ידיו, אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה)" (Mordechai on chapter "Hakoreh Omed" [Megillah, Chapter 3]; Hagahot Maimoni - chapter 15 of the Laws of Prayers; Agur). This Rama is a critical chiddush. The Rama argues that if the Kohen-Chazan is specifically called upon ("אמרו לו"), he must go up, even if other Kohanim are present, because otherwise "עובר על עשה" (he violates a positive commandment). This elevates the specific call to a chiyuv yachid (individual obligation), potentially overriding the usual protocol. The Magen Avraham leverages this Rama for his wider chiddush.
  • "ואפילו אין שם כהן אלא הוא, אינו נושא כפיו אלא אם כן מובטח שלא תטרף דעתו לחזור לתפלתו." This phrase highlights the profound concern for kavanah (intention/focus) in Shemoneh Esrei. The Kohen-Chazan may only duchen if he is certain his mind will not be confused when he returns to his prayer. This is a significant caveat, placing the burden of self-assessment on the Kohen. "מובטח" (certain/assured) is a high bar.
  • "וכיצד יעשה? עוקר רגליו קצת בעבודה, וממשיך להתפלל עד ולך נאה להודות." This intricate procedure for the Kohen-Chazan who does duchen demonstrates how Chazal sought to minimize the interruption of Shemoneh Esrei. "עוקר רגליו קצת" (uproots his feet a little) is a symbolic act, signifying a mental shift towards Birkat Kohanim without fully abandoning Shemoneh Esrei. The continuation "עד ולך נאה להודות" indicates a specific point in the prayer (the end of Modim) where the interruption is less disruptive.
  • "ואז עולה לדוכן ומברך נשיאת כפים, ואחר קורא לו, והוא משלים שים שלום. אבל אם הקורא מכוון בתפלת הש"ץ מתחלה ועד סוף, מוטב שישלים הקורא שים שלום." The Kohen-Chazan does not prompt himself, and the chazan (now a Kohen on the duchan) completes "Sim Shalom" after duchening. This implies a specific structure to reintegrate the Birkat Kohanim into the Shemoneh Esrei repetition. The Rama's gloss at the end of the s'if offers an alternative: "מוטב שישלים הקורא שים שלום" (it is better for the caller to complete "Sim Shalom") if the caller had kavanah with the chazan's prayer. This suggests a preference for the shaliach tzibbur (prayer leader's agent) to maintain continuity.

These linguistic nuances underscore the delicate balance between various mitzvot, the demands of communal prayer, and the sanctity of individual prayer, all within the framework of Birkat Kohanim.

Readings

The sugya concerning a Kohen's obligation to duchen, particularly when already engaged in Shemoneh Esrei, has spawned a fascinating and intricate lomdus among the Rishonim and Acharonim. The core tension lies between the chiyuv of Birkat Kohanim and the severe prohibition against interrupting Shemoneh Esrei.

Magen Avraham 128:40: The Compelling Obligation to Interrupt

The Magen Avraham (Rabbi Avraham Gombiner, d. 1683), in his commentary on Shulchan Arukh 128:40, presents a groundbreaking chiddush that fundamentally shifts the understanding of a Kohen's obligation. While the Shulchan Arukh (128:30) states that a Kohen-Chazan with other Kohanim present does not duchen, and only must do so if he's the only Kohen and won't get confused, the Rama's gloss adds a critical caveat: "אבל אם אמרו לו [לעלה ויטול ידיו], חייב לעלות, דעובר על עשה אם אינו עולה" (But if they told him [to go up and wash his hands], he is obligated to go up, for he violates a positive commandment if he does not go up).

The Magen Avraham seizes upon this Rama and extends its principle. He argues that this chiyuv to ascend when called, even if other Kohanim are present, is so potent that it mandates interrupting Shemoneh Esrei. His reasoning is built on several layers:

1. Nature of the Chiyuv: The Magen Avraham understands the Rama's phrase "עובר על עשה" not merely as a general mitzvah for Kohanim to bless, but as an individual obligation (חיוב יחיד) that falls upon any eligible Kohen present when the tzibbur requires the blessing, especially when explicitly called. This elevates the mitzvah from a collective duty to a personal imperative in such circumstances.
2. Comparison to Kriat Shema for Aliyah (קל וחומר): The Magen Avraham draws a kal v'chomer (a fortiori argument) from a seemingly less stringent case. He notes that some Rabbis permit interrupting Kriat Shema (which is d'Oraita, a Torah-level obligation) to accept an aliyah to the Torah, even though accepting the aliyah is primarily a matter of kavod ha'Kohen (honor of the Kohen) and not a mitzvah aseh incumbent upon him in the same way Birkat Kohanim is. The interruption for aliyah is also significant, as Kriat HaTorah is a distinct practice from Kriat Shema.
   • If one may interrupt Kriat Shema for a mere kavod, then surely one may interrupt Shemoneh Esrei (which is d'Rabbanan by some opinions, or at least less stringent regarding interruption than Kriat Shema in certain contexts) for Birkat Kohanim, which is a mitzvah aseh upon the Kohen.
   • He articulates this comparison by highlighting that the aliyah for Kriat Shema is not a direct mitzvah on the Kohen that he violates by not going up. Yet, even in that case, some permit interruption. So surely here, where one violates a positive commandment by not ascending, and Birkat Kohanim is structurally incorporated into Shemoneh Esrei, the interruption is justified.
3. Proof from Tosafot Sotah 38b: The Magen Avraham buttresses his argument with a powerful proof from Tosafot in Sotah 38b. Tosafot there discuss whether a Kohen should perform Birkat Kohanim if it involves becoming tameh met (ritually impure from a corpse), which is a d'Oraita prohibition for Kohanim. The mere fact that Tosafot entertains such a discussion – whether one d'Oraita (Birkat Kohanim) can override another d'Oraita (tumah) – implies the immense weight and chiyuv of Birkat Kohanim. If the mitzvah of Birkat Kohanim is so strong that it could potentially override even a Lo Ta'aseh (negative commandment) from the Torah, then it certainly should justify interrupting Shemoneh Esrei, which is generally considered a d'Rabbanan or, at least, subject to d'Rabbanan rules regarding interruption. This kal v'chomer is not explicitly stated as such by the Magen Avraham, but it is the logical inference: if Birkat Kohanim has such chashivut (importance) that it could even involve violating a Lo Ta'aseh, then interrupting Shemoneh Esrei for it is a fortiori permissible.

In sum, the Magen Avraham's chiddush is that when a Kohen is explicitly called to duchen, the mitzvah aseh becomes a personal, compelling obligation that overrides the sanctity of Shemoneh Esrei, demanding an interruption.

Mishnah Berurah 128:106: Elaboration and the Counter-Argument

The Mishnah Berurah (Rabbi Yisrael Meir Kagan, the Chofetz Chaim, d. 1933) in 128:106, thoroughly unpacks the Magen Avraham's position and provides further clarification, while also introducing a crucial counter-argument.

1. Repeating Birkat Kohanim and Bal Tosif: The Mishnah Berurah begins by affirming the S.A.'s ruling (128:28) that a Kohen may duchen multiple times in a day. He reiterates the principle that "ליכא בל תוסיף בעשיית המצוה שתי פעמים" (there is no bal tosif in performing the mitzvah twice). The prohibition of bal tosif applies to adding to the form or number of mitzvot in a general sense, not to performing an existing mitzvah multiple times when the opportunity arises (e.g., lulev for multiple days, or tzitzit on multiple garments). Each act of Birkat Kohanim for a tzibbur is a distinct mitzvah. He further notes (citing Mishnah Berurah 128:11) that even when duchening multiple times, the Kohen recites the beracha "אשר קדשנו ב"ו וכו'" each time.
2. Interrupting Shemoneh Esrei - Reinforcing the Magen Avraham: The Mishnah Berurah then delves into the Kohen-Chazan sugya from S.A. 128:30. He explicitly states that if there is no other Kohen, the Kohen-Chazan must interrupt his Shemoneh Esrei to duchen, lest Birkat Kohanim be nullified. After duchening, he returns to complete his tefillah.
   • Crucially, he reiterates the Magen Avraham's chiddush: "ואם יש שם כהן אחר אינו פוסק מתפלתו אם לא שאמרו לו עלה לדוכן או טול ידיך דאז אפילו יש שם כהנים אחרים צריך להפסיק ולעלות." (If there is another Kohen, he does not interrupt his prayer, unless they tell him to go up to the platform or wash his hands, in which case, even if there are other Kohanim, he must interrupt and go up). This confirms the Magen Avraham's interpretation of the Rama's gloss as an imperative to interrupt.
3. The Aruch HaShulchan / Yaavetz Counter-Argument: The Mishnah Berurah then introduces a significant dissenting opinion: "אמנם הא"ר מפקפק בעיקר היתר זה של הפסק באמצע התפלה אפילו באמרו לו עלה דאע"ג דתפלה דרבנן היא מ"מ אפשר דהעמידו חכמים דבריהם אפילו במקום עשה וכן דעת הגאון יעב"ץ בסידורו שלא להפסיק באמצע התפלה לנ"כ כשעומד בברכה אחרת אם לא שהגיע בתפלתו למקום ברכת כהנים שאז דעתו שמותר לו לעקור רגליו ולעלות לדוכן שבמקום זה לא מקרי הפסק שהוא מעין שים שלום." (However, the Eliyah Rabbah [Rabbi Eliyahu Shapiro, d. 1712, a contemporary of the Magen Avraham and Taz, often cited by the Mishnah Berurah] expresses doubt about this fundamental permission to interrupt in the middle of tefillah, even if he is told to go up. For even though tefillah is d'Rabbanan, it is possible that Chazal strengthened their words even in a place of mitzvah aseh. This is also the opinion of the Gaon Yaavetz [Rabbi Yaakov Emden, d. 1776] in his Siddur, that one should not interrupt in the middle of tefillah for Birkat Kohanim when standing in another beracha, unless he has reached the place of Birkat Kohanim in his prayer, at which point he is of the opinion that it is permissible to uproot his feet and go up to the duchan, for at that point it is not considered an interruption, as it is related to Sim Shalom).
   • This is a profound machloket. The Eliyah Rabbah and Yaavetz argue that the sanctity and stringency of Shemoneh Esrei, even if d'Rabbanan, might be so great that Chazal prohibited its interruption even for a mitzvah aseh. They suggest that Chazal "strengthened their words" (העמידו חכמים דבריהם) to prevent any interruption. The Yaavetz offers a partial leniency: if the Kohen-Chazan has reached the beracha of R'tzei (where Birkat Kohanim is traditionally inserted), the interruption is less severe because it's conceptually linked to that part of the tefillah.
4. Condition of "מובטח שלא תטרף דעתו": The Mishnah Berurah concludes by emphasizing the S.A.'s critical condition: "וגם זה דוקא אם הוא מובטח שלא תטרף דעתו ויחזור לתפלתו ובלא"ה אסור בכל גווני להפסיק בתפלה זהו תוכן דבריו שם ע"ש" (And this is only if he is certain that his mind will not be confused and he will return to his prayer; otherwise, it is forbidden to interrupt tefillah in any case). This caveat applies to all scenarios where interruption is considered, even where technically permissible.

The Mishnah Berurah thus presents the Magen Avraham's position as the stama d'gemara (unqualified ruling) but immediately counters with the stringent view of the Eliyah Rabbah and Yaavetz, reflecting a significant machloket l'maaseh.

Levushei Serad 128:38: Defending the Magen Avraham's Kal V'Chomer

The Levushei Serad (Rabbi David Shlomo Eibeschutz, d. 1813), in his commentary on the Magen Avraham 128:38, directly engages with the Magen Avraham's kal v'chomer regarding interrupting Kriat Shema for an aliyah versus Shemoneh Esrei for Birkat Kohanim. The Eliyah Rabbah (cited by the Mishnah Berurah) and others raised a kushya: Shemoneh Esrei is generally considered more stringent regarding interruption than Kriat Shema. How can the Magen Avraham prove from a lenient case (Kriat Shema) to a more stringent one (Shemoneh Esrei)?

The Levushei Serad defends the Magen Avraham by meticulously explaining the nuances of the comparison:

1. Distinguishing Kriat Shema and Shemoneh Esrei Interruptions: He acknowledges the general rule that Shemoneh Esrei is indeed more stringent to interrupt than Kriat Shema (see O.C. 104:7). However, he argues that the Magen Avraham's comparison is not a simple one of general stringency, but rather a contextual one.
2. The Nature of the Interruption and the Mitvah:
   • For Kriat Shema and Aliyah: The aliyah is primarily for the kavod of the Kohen, and the act of Kriat HaTorah is distinct from Kriat Shema. The Magen Avraham himself noted that there is no disrespect if the Kohen doesn't go up when reading Shema. Yet, some poskim still permit interruption. This demonstrates that even for a "lesser" reason (honor) and a "greater" interruption (disconnected mitzvah), some allow it.
   • For Shemoneh Esrei and Birkat Kohanim: Here, the stakes are much higher. The Kohen violates a mitzvah aseh if he doesn't duchen when called. Furthermore, Birkat Kohanim is integrated into the Shemoneh Esrei repetition (specifically around R'tzei and Modim), making the interruption less jarring or "disconnected" than an aliyah during Kriat Shema. The Levushei Serad states: "דכיון דבקראוהו לתורה פוסק בק"ש מסתברא דבנ"כ דחמיר דעובר בעשה ותו דבנ"כ שייכא לתפלה ולא הוי כ"כ הפסק פוסק גם בתפלה" (Since for aliyah to the Torah one interrupts Kriat Shema, it is logical that for Birkat Kohanim, which is more severe as one violates a mitzvah aseh, and furthermore Birkat Kohanim is related to tefillah and not such a great interruption, one also interrupts in tefillah).
3. The Levushei Serad's Defense:* He synthesizes these points: The Magen Avraham's kal v'chomer is not about the general stringency of Shemoneh Esrei versus Kriat Shema for any interruption. Rather, it is about the relative weight of the reason for interruption versus the degree of interruption. For Birkat Kohanim, the reason is a chiyuv aseh and the interruption is relatively "internal" to the tefillah. For aliyah, the reason is kavod and the interruption is more "external." If Chazal permitted the latter, then the former is certainly permissible. He frames the Magen Avraham's argument as: even if Shemoneh Esrei is generally more stringent, the specific case of Birkat Kohanim presents a confluence of factors (violation of mitzvah aseh, integration into tefillah) that makes interruption permissible, and the Kriat Shema case provides a valid analogy to demonstrate this principle.

Thus, the Levushei Serad provides a robust defense of the Magen Avraham's kal v'chomer, clarifying that the comparison is not about the absolute stringency of the prayers themselves, but the dynamic interplay between the obligation to interrupt and the nature of the interruption.

Ba'er Hetev 128:47 / Kaf HaChayim 128:164: No Chiyuv for Repetition

The Ba'er Hetev (Rabbi Yehudah Ashkenazi, d. 1770) and Kaf HaChayim (Rabbi Yaakov Chaim Sofer, d. 1939) both elaborate on the first part of S.A. 128:28, which states that a Kohen who has already duchened may do so again in a different synagogue.

• Ba'er Hetev 128:47: "דליכא בל תוסיף בעשיית המצוה ב' פעמים אבל אין בו חיוב אפילו אם הוא בבה"כ כשקורין כהנים כיון שכבר נשא כפיו פעם אחת." (For there is no bal tosif in performing the mitzvah twice, but there is no obligation upon him, even if he is in the synagogue when they call Kohanim, since he has already raised his hands once).
• Kaf HaChayim 128:164: Similarly states: "אבל חיובא ליכא ואפי' אמרו לו לעלות אינו עובר כמ"ש לעיל בסעי' ג'." (But there is no obligation, and even if they tell him to go up, he does not violate [a commandment], as stated above in s'if 3).

Their chiddush is one of clarification: while the S.A. says "יכול לישא את כפיו" (he may raise his hands), these Acharonim explicitly state that there is no obligation (אין בו חיוב) to do so a second time. This is a critical distinction. The mitzvah of Birkat Kohanim is a mitzvah aseh incumbent upon Kohanim to bless Klal Yisrael. Once a Kohen has fulfilled this mitzvah for Klal Yisrael on a given day, he has discharged his personal obligation. Subsequent opportunities to duchen, while permissible and even laudable, do not carry the same weight of chiyuv yachid that would, for instance, compel an interruption of Shemoneh Esrei.

This perspective provides a counterpoint to the Magen Avraham's stringent view. The Magen Avraham's argument for interrupting Shemoneh Esrei relies on the Rama's gloss that if a Kohen is told to go up, he violates an aseh if he refuses. The Ba'er Hetev and Kaf HaChayim, by stating that there's no chiyuv for a second duchening even if told, imply that the Rama's "עובר על עשה" applies only to a Kohen who has not yet duchened at all that day. If he has already duchened, the mitzvah aseh has been fulfilled, and any subsequent call, while an opportunity, is not a chiyuv that would necessitate such an extreme measure as interrupting Shemoneh Esrei. This subtle distinction highlights the conditional nature of the "עובר על עשה" phrase, limiting its application to the initial performance of the mitzvah for the day.

Friction

The sugya presents several points of friction, where various halachic principles clash, leading to rigorous debate among poskim. We'll focus on two primary kushyot with their corresponding terutzim.

Kushya 1: Interrupting Shemoneh Esrei for Birkat Kohanim

The most significant kushya in this sugya revolves around the Kohen-Chazan and the instruction to interrupt Shemoneh Esrei for Birkat Kohanim.

The Problem: The Shulchan Arukh (O.C. 128:30) states that a Kohen-Chazan doesn't duchen if other Kohanim are present. However, the Rama's gloss adds: "אבל אם אמרו לו, חייב לעלות, דעובר על עשה אם אינו עולה" (But if they told him, he is obligated to go up, for he violates a positive commandment if he does not go up). The Magen Avraham (128:40) then extends this, arguing that this chiyuv is so strong it necessitates interrupting Shemoneh Esrei. This is profoundly difficult. Shemoneh Esrei is the pinnacle of prayer, with stringent rules against interruption. The general halacha (O.C. 104:7) forbids interrupting Shemoneh Esrei even for significant reasons, except for pikuach nefesh (saving a life) or to rectify an error in the prayer itself. How can a mitzvah aseh of Birkat Kohanim, which might even be considered a mitzvah d'Rabbanan in its current form (due to galut and lack of Beis HaMikdash), justify interrupting Shemoneh Esrei, which is d'Oraita according to many, or at least has the stringency of d'Oraita by d'Rabbanan decree? This tension between the chiyuv of Birkat Kohanim and the sanctity of Shemoneh Esrei is sharp.

Terutz 1: The Magen Avraham's Unqualified Obligation

The Magen Avraham resolves this kushya by elevating the chiyuv of Birkat Kohanim when a Kohen is called. He maintains that:

1. Birkat Kohanim is a Mitzvah Aseh on the Kohen: The Rama's language "עובר על עשה" is taken literally. This isn't just a communal mitzvah; it becomes a personal obligation on the individual Kohen when he is present and called. The Chazal did not intend for a mitzvah aseh to be nullified by the d'Rabbanan (or d'Oraita with d'Rabbanan rules) prayer of Shemoneh Esrei.
2. Comparison to Less Stringent Interruptions: The Magen Avraham's kal v'chomer from Kriat Shema for an aliyah is pivotal here. As discussed in the "Readings" section, if one can interrupt Kriat Shema (d'Oraita) for a kavod (honor) related aliyah, then a fortiori one can interrupt Shemoneh Esrei (d'Rabbanan in its current form, or less stringent than Kriat Shema regarding specific types of interruptions) for a direct mitzvah aseh that would otherwise be violated. The Levushei Serad (128:38) defends this kal v'chomer by highlighting that Birkat Kohanim is "shiyacha l'tefillah" (related to the prayer) and thus less of a foreign interruption compared to Kriat HaTorah during Kriat Shema.
3. Proof from Tosafot Sotah: The Magen Avraham also points to Tosafot Sotah 38b, which debates whether a Kohen should become tameh met (violating a Lo Ta'aseh d'Oraita) to perform Birkat Kohanim. If Birkat Kohanim can be considered weighty enough to potentially override a Lo Ta'aseh d'Oraita, it certainly can override the prohibition of interrupting Shemoneh Esrei. The Tosafot there indeed suggest that Birkat Kohanim is a mitzvah rabba (great mitzvah), and its chashivut is immense.

Essentially, the Magen Avraham argues that the chiyuv of Birkat Kohanim is of such a high order, especially when it becomes a chiyuv yachid upon being called, that it trumps the general prohibition of interrupting Shemoneh Esrei. The mitzvah of blessing Israel is a direct command from God, and its fulfillment takes precedence.

Terutz 2: The Aruch HaShulchan / Yaavetz's Stringent View (as cited by Mishnah Berurah)

A significant counter-argument, cited by the Mishnah Berurah (128:106) from the Eliyah Rabbah and Yaavetz, takes a more stringent stance:

1. "He'emidu Chachamim Divreihem": This view posits that even if Shemoneh Esrei is d'Rabbanan, Chazal "strengthened their words" (העמידו חכמים דבריהם) regarding its non-interruption. This means that even a mitzvah aseh d'Oraita might not be sufficient to justify an interruption, because Chazal deliberately placed a high barrier to preserve the sanctity and flow of Shemoneh Esrei. The fear is that if exceptions are made, the entire structure of prayer could unravel.
2. Specific Context for Interruption: The Yaavetz offers a nuanced concession: interruption might be permissible only if the Kohen-Chazan has reached the part of his own Shemoneh Esrei where Birkat Kohanim is integrated into the communal prayer (i.e., around R'tzei / Modim). At this point, the act of "uprooting his feet" is not a complete interruption but a shift within a related segment of prayer, hence "לא מקרי הפסק שהוא מעין שים שלום" (it is not considered an interruption, as it is related to Sim Shalom). This suggests that the chiyuv of Birkat Kohanim can only override the prayer's continuity when the interruption is minimal and contextually appropriate.
3. The "מובטח" (Certainty) Condition: Both the S.A. and the Mishnah Berurah emphasize the condition "מובטח שלא תטרף דעתו" (certain that his mind will not be confused). This condition is a sine qua non for any interruption. Even if the halachic justification for interruption exists, if the Kohen feels he will lose his kavanah and be unable to resume his prayer coherently, he must not interrupt. This highlights the subjective element and the paramount importance of kavanah in Shemoneh Esrei.

This machloket reflects a fundamental disagreement on the hierarchy of mitzvot and the extent to which Chazal's enactments can impact d'Oraita obligations. The Magen Avraham prioritizes the direct mitzvah aseh when called, while the Eliyah Rabbah and Yaavetz prioritize the integrity and sanctity of Shemoneh Esrei as established by Chazal.

Kushya 2: "Bal Tosif" and Repeating Birkat Kohanim

The Problem: Shulchan Arukh O.C. 128:28 states: "כהן שנשא כפיו ואחר כך הלך לבית הכנסת אחרת... יכול לישא את כפיו פעם אחרת" (A Kohen who raised his hands and afterwards went to another synagogue... may raise his hands once again). This permission to repeat Birkat Kohanim seems to run headlong into the prohibition of Bal Tosif (Do not add), derived from Devarim 4:2, which states "לא תספו על הדבר אשר אנכי מצוה אתכם ולא תגרעו ממנו לשמר את מצות ה' אלקיכם" (You shall not add to the word which I command you, nor shall you subtract from it, to keep the commandments of the LORD your God). If Birkat Kohanim is a mitzvah, performing it a second time in the same day appears to be "adding" to the mitzvah, or performing it beyond its prescribed bounds.

Terutz 1: Bal Tosif Does Not Apply to Repetition of the Mitzvah

The standard terutz, articulated by the Ba'er Hetev (128:47), Mishnah Berurah (128:106), and Kaf HaChayim (128:163), is that Bal Tosif is not applicable in this context. Their reasoning is based on a foundational understanding of Bal Tosif:

1. Nature of Bal Tosif: Bal Tosif prohibits adding a new element to a mitzvah (e.g., five species for lulav instead of four), or creating a new mitzvah entirely. It does not prohibit performing an existing mitzvah multiple times when the opportunity arises.
2. Each Performance is a New Instance: Each performance of Birkat Kohanim before a tzibbur is considered a distinct fulfillment of the mitzvah. The mitzvah is to bless Klal Yisrael. If a Kohen encounters a different tzibbur, or even the same tzibbur at a later prayer service (e.g., Shacharit and Musaf), and they require the blessing, it constitutes a new instance where the mitzvah can be performed. It's not "adding" to the mitzvah of Birkat Kohanim (e.g., by adding a fourth verse to the blessing), but rather performing the same mitzvah again for a new audience or occasion.
3. Benefit to Klal Yisrael: The blessing benefits Klal Yisrael. Each tzibbur that receives the blessing gains from it. Therefore, a Kohen who blesses multiple times is not adding to the mitzvah itself, but rather extending its benefit and fulfilling it for more people or at different times. The Kaf HaChayim (128:163) explicitly notes that the Kohen recites the blessing "אשר קדשנו ב"ו וכו'" each time he performs Birkat Kohanim, indicating that each instance is a complete, independent fulfillment.

This terutz aligns with the general halachic principle that many mitzvot can be repeated if the conditions for their performance are met again. For example, one who eats matzah at multiple sedarim in different locations is not violating Bal Tosif. The mitzvah is to eat matzah at the seder. If one is at multiple sedarim, one repeats the mitzvah. Similarly, the mitzvah of Birkat Kohanim is to bless Klal Yisrael at the appropriate time in tefillah. If a Kohen finds himself in multiple such situations, he may perform the mitzvah each time.

Intertext

The sugya of Birkat Kohanim in S.A. O.C. 128:28-30 is deeply interwoven with various other foundational texts in Jewish law and thought. Its complexities often find parallels and resolutions by drawing on broader halachic principles.

1. Tanakh: Devarim 4:2 and 13:1 (Bal Tosif)

The prohibition of Bal Tosif (Do not add) is a cornerstone of Torah law, articulated in Devarim 4:2 and reiterated in 13:1. It ensures the integrity and divine origin of the mitzvot. The Shulchan Arukh (128:28) permits a Kohen to perform Birkat Kohanim multiple times in a day if he encounters different congregations. This immediately raises the specter of Bal Tosif.

The resolution, as clarified by Magen Avraham, Ba'er Hetev, and Mishnah Berurah, hinges on the precise definition of Bal Tosif. The Sefer HaChinuch (Mitzvah 454) explains that Bal Tosif applies to adding a new element to a mitzvah (e.g., five minim for lulav instead of four) or creating a new mitzvah entirely. It does not forbid performing an existing mitzvah multiple times when the opportunity arises. For instance, one who dons tefillin multiple times a day, or eats matzah at multiple sedarim, does not violate Bal Tosif. The mitzvah of Birkat Kohanim is to bless the people Israel. Each distinct congregation at each distinct prayer service constitutes a separate opportunity to fulfill this mitzvah. The Kohen is not adding to the form of the blessing or creating a new requirement; rather, he is fulfilling the same mitzvah anew for a different instance. This interpretation is crucial for understanding the flexibility within halacha regarding repeated mitzvot.

2. Gemara Megillah 22a and Sotah 38b (Birkat Kohanim Requirements)

Many of the procedural halachot detailed in S.A. 128 (e.g., standing, loud voice, holy language, specific hand gestures) are rooted in the Gemara. Megillah 22a discusses the proper performance of Birkat Kohanim, emphasizing the need for a minyan and the Kohen being part of it. Sotah 38b is particularly rich, elaborating on the requirements for the Kohen, the tzibbur, and the blessings.

• Requirements for the Kohen: Sotah 38b enumerates various disqualifying factors, many of which are codified in S.A. 128:30-45. These include physical defects (e.g., "bohakniyot," "akumot," "akushot" – a Kohen with spotted, crooked, or bent hands), moral failings (e.g., a murderer, an apostate, one who married a divorcée), and ritual impurity. The Gemara's concern is that any defect that causes the congregation to stare at the Kohen distracts from the kavanah of the blessing. The S.A.'s allowance for a "broken-in" Kohen or one who drapes a tallit over his face directly addresses these Gemara concerns.
• The Tosafot in Sotah 38b: This Tosafot is directly referenced by the Magen Avraham (128:40) in his argument for interrupting Shemoneh Esrei. The Tosafot discusses whether a Kohen should duchen if it involves becoming tameh met (ritually impure from a corpse), which is a d'Oraita prohibition. The very fact that Tosafot entertains this sha'ala (question) – whether a mitzvah aseh of Birkat Kohanim could override a Lo Ta'aseh d'Oraita of tumah – underscores the immense chashivut (importance) and compelling nature of Birkat Kohanim. If it could potentially override a d'Oraita prohibition, then interrupting Shemoneh Esrei (which is d'Rabbanan or has d'Rabbanan stringencies) becomes more readily understandable.

3. Rambam Hilchot Tefillah 15:8 (Kohen-Chazan Protocol)

The Rambam (Maimonides, Rabbi Moshe ben Maimon, d. 1204) in Hilchot Tefillah 15:8 provides a foundational perspective on the Kohen-Chazan scenario, which is partially quoted and built upon by the Shulchan Arukh 128:30. The Rambam states: "הש"ץ שהוא כהן, אינו עולה לדוכן, כדי שלא יפסיק מן התפלה, אם יש שם כהנים אחרים. אבל אם אין שם כהן אלא הוא, עולה לדוכן ומברך, כדי שלא תתבטל ברכת כהנים, וגומר תפלתו" (A prayer leader who is a Kohen does not ascend the platform, so as not to interrupt his prayer, if there are other Kohanim present. But if there is no other Kohen, he ascends the platform and blesses, so that Birkat Kohanim should not be nullified, and then he completes his prayer).

The Rambam emphasizes two key principles:

1. Minimizing Interruption: The primary concern is "כדי שלא יפסיק מן התפלה" (so as not to interrupt his prayer). This highlights the sanctity of Shemoneh Esrei.
2. Preventing Nullification of Birkat Kohanim: If he is the only Kohen, the value of "כדי שלא תתבטל ברכת כהנים" (so that Birkat Kohanim should not be nullified) takes precedence, justifying the interruption.

The Rambam's position forms the bedrock of S.A. 128:30. The Shulchan Arukh adds the crucial condition "מובטח שלא תטרף דעתו לחזור לתפלתו" (certain that his mind will not be confused to return to his prayer), which is absent in this specific Rambam but implied by the overall importance of kavanah in his Mishneh Torah. The Rama's gloss, compelling the Kohen-Chazan to duchen even if other Kohanim are present if called, is a later development (likely from Mordechai), adding a new layer of chiyuv yachid that goes beyond the Rambam's simpler framework.

4. Shulchan Arukh Orach Chayim 104:7 (General Rules for Interrupting Shemoneh Esrei)

The halachot of interrupting Shemoneh Esrei are meticulously detailed in S.A. O.C. 104:7. The general rule is extremely strict: "אין מפסיקין בתפלה אפילו לשאלת שלום" (One does not interrupt in prayer even for a greeting of peace). Exceptions are extremely rare and limited, such as pikuach nefesh (saving a life) or to prevent a major sin.

This general stringency is what makes the Magen Avraham's chiddush (permitting interruption for Birkat Kohanim when called) so radical and the Eliyah Rabbah's/ Yaavetz's counter-argument (that Chazal strengthened their words) so compelling. The Magen Avraham posits that the "עשה" (positive commandment) of Birkat Kohanim is a rare exception that can override the general rule. However, the Eliyah Rabbah suggests that the general rule's strictness is so absolute that it might even override some mitzvot aseh. This machloket highlights the tension between the individual chiyuv to perform a mitzvah and the communal halacha governing prayer, emphasizing the profound weight given to Shemoneh Esrei's integrity.

5. Responsa Literature: Radvaz and Ginat V'radim (Practical Applications)

Later poskim in responsa literature often grappled with the practical implications of these debates.

• Radvaz (Rabbi David ibn Zimra, d. 1573): The Magen Avraham himself (128:40) cites the Radvaz (Part 1, Siman 153) as a source for the idea that if a Kohen is duchening and there's no other Kohen, he should interrupt. The Radvaz is a critical early voice emphasizing the importance of preventing the nullification of Birkat Kohanim. His ruling provides a precedent for the idea that Birkat Kohanim can indeed necessitate an interruption, at least in the extreme case of no other Kohanim.
• Ginat V'radim (Rabbi Avraham Halevi, d. 1709) and Zera Avraham (Rabbi Avraham ben David, d. 1718): These Acharonim are cited by the Ba'er Hetev (128:47) in his discussion of repeating Birkat Kohanim. They support the idea that while one may repeat, there is no chiyuv to do so. Their responsa likely dealt with specific cases where Kohanim were unsure if they must duchen again, or if they had fulfilled their obligation. These poskim reinforce the distinction between permission and obligation, especially regarding mitzvot that can be repeated. This practical clarification, emerging from responsa, helps to define the limits of the Kohen's responsibility once the initial mitzvah is fulfilled for the day.

These intertextual connections demonstrate that the sugya of Birkat Kohanim is a microcosm of broader halachic principles, revealing the complex interplay between d'Oraita and d'Rabbanan, the sanctity of prayer, the obligation of mitzvot, and the role of minhag.

Psak/Practice

The halachot of Birkat Kohanim as presented in S.A. O.C. 128:28-30, especially with the Rama's glosses, reflect a dynamic interplay between foundational principles and diverse customs.

The Kohen's Obligation to Duchen

The basic psak is that any eligible Kohen in the synagogue, when "Kohanim" is called, has a mitzvah aseh to ascend the duchan and bless the congregation. If he refuses without a valid disqualification, he is considered to have violated a positive commandment (S.A. 128:2). However, if he has already duchened earlier that day, he is not obligated to duchen again, even if called, although he may do so (S.A. 128:28, Ba'er Hetev 128:47, Kaf HaChayim 128:164). This distinction between "may" and "must" is critical.

The Kohen-Chazan Dilemma

This is perhaps the most nuanced area.

• With Other Kohanim: If the chazan is a Kohen and other Kohanim are present, he generally does not duchen (S.A. 128:30). This is to avoid interrupting his Shemoneh Esrei. However, the Rama's gloss (128:30) introduces a chiddush: if he is explicitly called to duchen, he is obligated to go, as he would otherwise violate a mitzvah aseh. L'maaseh, many poskim are cautious about this, often instructing the gabbai not to call the Kohen-Chazan if other Kohanim are available, to avoid the dilemma.
• As the Sole Kohen: If the Kohen-Chazan is the only Kohen present, he must duchen, provided he is "מובטח שלא תטרף דעתו" (certain that his mind will not be confused) when he returns to his Shemoneh Esrei. The procedure involves "uprooting his feet" at R'tzei, continuing until "u'lekha na'eh l'hodot" (end of Modim), ascending, duchening, and then having someone else prompt him and complete Sim Shalom (S.A. 128:30). The Mishnah Berurah (128:106) reinforces this, but also cites the stricter view of the Eliyah Rabbah and Yaavetz that one should not interrupt Shemoneh Esrei at all unless it's at the Birkat Kohanim point in one's own Shemoneh Esrei. L'maaseh, the widespread custom leans towards the Magen Avraham's leniency for the sole Kohen if he is certain he won't get confused, but with a strong preference for avoiding the situation by having a non-Kohen chazan if possible, or by ensuring other Kohanim are present.

Disqualifying Factors and Repentance

The S.A. provides a long list of disqualifications (physical, moral, ritual).

• Physical Defects: Generally, a Kohen with a visible defect that would cause the congregation to stare is disqualified, unless he is "broken-in" (מוחזק) in that city (known to the community for 30+ days) or if the custom is to cover the face with a tallit and the hands are also covered (S.A. 128:39-41). The custom of covering with a tallit is widespread in many communities, effectively mitigating many physical disqualifications.
• Moral/Ritual Defects: For severe transgressions like killing, apostasy, or marrying a forbidden woman, the Kohen is disqualified. However, for some, teshuva (repentance) can restore eligibility. The Rama (128:34) states that regarding a Kohen who killed, "there is ground to be lenient regarding those who have repented, so as not to lock the door before them. And so is the custom." This reflects a meta-psak heuristic of encouraging repentance. For an apostate who repented, the S.A. (128:35) rules this is the primary halacha. However, a Kohen who married a divorcée (or other forbidden women) is disqualified until he divorces her and takes a public vow, reflecting the more permanent nature of these transgressions (S.A. 128:37).

Ashkenazi vs. Sefardi Custom

The Rama's gloss at the end of S.A. 128:44 notes a significant Ashkenazi custom: Birkat Kohanim is generally performed only on Yom Tov, and often specifically at Musaf, not on regular weekdays or even Shabbats, due to the Kohen's preoccupation with livelihood on other days, which hinders the necessary simcha (joy) and kavanah. In contrast, most Sefardi communities perform Birkat Kohanim daily. This is a prime example of minhag overriding a seemingly universal obligation, based on a sociological assessment of the Kohen's emotional state.

Meta-Psak Heuristics

1. Balancing Chiyuv Yachid and Kvod HaTzibbur: The sugya constantly balances the individual Kohen's chiyuv against the needs and reverence of the congregation, and the sanctity of prayer.
2. The Weight of Kavanah: The condition of "מובטח שלא תטרף דעתו" for the Kohen-Chazan underscores the paramount importance of kavanah in Shemoneh Esrei, even to the extent of overriding a mitzvah aseh if kavanah is compromised.
3. The Power of Minhag: The Ashkenazi custom regarding Yom Tov duchening demonstrates how firmly established minhagim can shape halachic practice, even for mitzvot d'Oraita, especially when tied to internal spiritual states like simcha.
4. Encouraging Teshuva: The leniency regarding repentant Kohanim who committed grave sins reflects a broader halachic principle of not "locking the door before those who repent."

Takeaway

The sugya of Birkat Kohanim is a profound lesson in the intricate balance of chiyuv, kavanah, and minhag, revealing how halacha meticulously navigates individual obligation against communal sanctity and the complexities of human spiritual states. It underscores that even mitzvot d'Oraita are performed within a context that considers psychological readiness and the integrity of other mitzvot.

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Footnotes:

• Ketubot, ch. 2, daf 24: Ketubot 24b.
• Tosafot in the chapter "Kol Kitvei" [Shabbat, ch. 16]: Shabbat 16a, s.v. "כל כתבי".
• Aguda, Chapter "HaKoreh et HaMegilla" [Megillah Chapter 2]: Agudah, Megillah 2b.
• Rashi, Tosefot, and the Ran...Beit Yosef]: Rashi on Sotah 39a, Tosafot on Sotah 38b, Ran on Megillah 22a, Beit Yosef O.C. 128.
• Tur in the name of R"i and the Rambam: Tur O.C. 128, citing Rosh (R"i) and Rambam (Hilchot Tefillah 15:8).
• Tur in the name of R"i and the R"m [Meir] of Rothenburg: Tur O.C. 128, citing Rosh and Maharam Rothenburg.
• Tur and the Ran - chapter "Hakoreh" [Talmud Megillah Chapter 2], and Hagahot Maimoni: Tur O.C. 128, Ran on Megillah 22a, Hagahot Maimoni on Rambam Hilchot Tefillah 15:10.
• Rashi - chapter "Eilu Ne'emarin" [Sotah, Chapter 7], and Hagahot Maimoni: Rashi on Sotah 39a, Hagahot Maimoni on Rambam Hilchot Tefillah 15:11.
• Agudah - chapter "Haya Koreh" [Brachot Chapter 2]: Agudah, Brachot 2b.
• Mordechai on chapter "Hakoreh Omed" [Megillah, Chapter 3]; Hagahot Maimoni - chapter 15 of the Laws of Prayers; Agur: Mordechai on Megillah 22a; Hagahot Maimoni on Rambam Hilchot Tefillah 15:8; Agur Siman 157.
• Mordechai in chapter "Nigmar Ha-din" [Chapter 6 of Sanhedrin]: Mordechai on Sanhedrin 7b (referring to Sanhedrin 7a).
• Mordechai at the end of chapter "Hakoreh Omed" [Chapter 4 of Megillah], and Hagahot Maimoni: Mordechai on Megillah 24a; Hagahot Maimoni on Rambam Hilchot Tefillah 15:10.
• Mordechai on Tractate Megillah chp. 4: Mordechai on Megillah 24a.
• Teshuvot Maharil - siman 148: Teshuvot Maharil Siman 148.
• Mordekhai, commentary to Tractate Gittin: Mordechai on Gittin 57a.
• Magen Avraham on Magen Avraham 128:40: Magen Avraham O.C. 128, sk. 40.
• Radvaz chelek 1 siman 153: Radvaz Vol. 1, Responsa 153.
• Rashba siman 185: Responsa Rashba Vol. 1, Responsa 185.
• Tosafot in Sotah: Tosafot on Sotah 38b, s.v. "כל ישראל".
• Ba'er Hetev on Shulchan Arukh, Orach Chayim 128:47: Ba'er Hetev O.C. 128, sk. 47.
• Tesu' Ginat V'radim כלל א' סי' י"ג. ובתשובת זרע אברהם חא"ח סי' י"ב: Ginat V'radim Clal 1, Siman 13; Zera Avraham O.C. Siman 12.
• Mishnah Berurah on Mishnah Berurah 128:106: Mishnah Berurah O.C. 128, sk. 106.
• A"R [Eliyah Rabbah] m'fakpek...Gaon Yaavetz b'siddur: Eliyah Rabbah O.C. 128, sk. 40; Yaavetz, Siddur Beit Yaakov, Birkat Kohanim.
• Be'er HaGolah on Be'er HaGolah on Shulchan Arukh, Orach Chayim 128:45: Be'er HaGolah O.C. 128, sk. 45. (This reference in the prompt is redundant as Be'er HaGolah only points to the preceding sources, adding no independent chiddush here).
• Kaf HaChayim on Kaf HaChayim on Shulchan Arukh, Orach Chayim 128:163:1: Kaf HaChayim O.C. 128, sk. 163.
• Kaf HaChayim on Kaf HaChayim on Shulchan Arukh, Orach Chayim 128:164:1: Kaf HaChayim O.C. 128, sk. 164.
• Levushei Serad on Levushei Serad on Shulchan Arukh, Orach Chayim 128:38: Levushei Serad O.C. 128, sk. 38.
• Devarim 4:2: Devarim 4:2.
• Devarim 13:1: Devarim 13:1 (in Jewish texts, this is 13:1, in some Christian translations it might be 12:32).
• Sefer HaChinuch, Mitzvah 454: Sefer HaChinuch, Mitzvah 454.
• Shulchan Arukh O.C. 104:7: Shulchan Arukh, Orach Chayim 104:7.
• Rambam Hilchot Tefillah 15:8: Rambam, Hilchot Tefillah u'Birkat Kohanim 15:8.
• Shulchan Arukh 128:2: Shulchan Arukh, Orach Chayim 128:2.
• Shulchan Arukh 128:39-41: Shulchan Arukh, Orach Chayim 128:39-41.
• Shulchan Arukh 128:34: Shulchan Arukh, Orach Chayim 128:34.
• Shulchan Arukh 128:35: Shulchan Arukh, Orach Chayim 128:35.
• Shulchan Arukh 128:37: Shulchan Arukh, Orach Chayim 128:37.
• Shulchan Arukh 128:44 (Rama): Shulchan Arukh, Orach Chayim 128:44 (Rama's gloss).