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Mishnah Bekhorot 1:6-7

On-RampExpert – Beit Midrash AnalysisNovember 30, 2025

Sugya Map

  • Issue: The nature and scope of achrayut (financial responsibility) for a lamb designated to redeem a peter chamor (firstborn donkey) if the lamb dies before being given to the Kohen. This branches into the status of the donkey and lamb if either dies after designation.
  • Nafka Mina(s):
    • Whether the owner is obligated to replace the deceased designated lamb.
    • The kedushah (sanctity) status of the peter chamor if the designated lamb dies or if the donkey itself dies after designation.
    • The underlying shitta (stance) regarding when the act of pidyon (redemption) takes effect: upon mental designation (hafrasha) or upon physical transfer to the Kohen (mesirah l'Kohen).
  • Primary Sources: Mishnah Bekhorot 1:6-7; Gemara Bekhorot 13b (implicit in commentaries); Mishnah Eduyot 7:1.

Text Snapshot

The crux of our sugya appears in Mishnah Bekhorot 1:6-7, concerning the machloket between Rabbi Eliezer and the Rabbis:

הַמַּפְרִישׁ פִּדְיוֹן פֶּטֶר חֲמוֹר וּמֵת, רַבִּי אֱלִיעֶזֶר אוֹמֵר: חַיָּב בְּאַחְרָיוּתוֹ כַּחֲמֵשׁ סְלָעִים שֶׁל בֵּן. וַחֲכָמִים אוֹמְרִים: אֵין חַיָּבִין בְּאַחְרָיוּתוֹ כְּפִדְיוֹן מַעֲשֵׂר שֵׁנִי. הֵעִיד רַבִּי יְהוֹשֻׁעַ וְרַבִּי צָדוֹק עַל פִּדְיוֹן פֶּטֶר חֲמוֹר שֶׁמֵּת, שֶׁאֵין בּוֹ לַכֹּהֵן כְּלוּם. If one designates a lamb for the redemption of a firstborn donkey and the lamb dies, Rabbi Eliezer says: He bears financial responsibility and must give the priest another lamb in its place. This is like the case of the five sela for redemption of a firstborn son, where if the money is lost before one gives it to the priest, he must give the priest another five sela. And the Rabbis say: He does not bear financial responsibility. This is like the case of money designated for redemption of second-tithe produce, where once the owner designates the money for redemption, the produce is desanctified. Rabbi Yehoshua and Rabbi Tzadok testified about a lamb designated for redemption of a firstborn donkey that died, that the priest has nothing here, i.e., in such a case, as the firstborn donkey has already been redeemed, and the owner no longer bears financial responsibility for the dead lamb, in accordance with the opinion of the Rabbis. (Mishnah Bekhorot 1:6)

מֵת פֶּטֶר חֲמוֹר, רַבִּי אֱלִיעֶזֶר אוֹמֵר: יִקָּבֵר, וּמֻתָּר בַּהֲנָיָתוֹ שֶׁל טָלֶה. וַחֲכָמִים אוֹמְרִים: אֵינוֹ צָרִיךְ לִיקָּבֵר, וְטָלֶה לַכֹּהֵן. If after the lamb was designated, the firstborn donkey died, Rabbi Eliezer says: The donkey must be buried, and the owner is permitted to derive benefit from the lamb. And the Rabbis say: It does not need to be buried, and the lamb is given to the priest. (Mishnah Bekhorot 1:7)

Dikduk/Leshon Nuance: The Mishnah's use of "חייב באחריותו" (bears responsibility) by R. Eliezer and "אין חייבין באחריותו" (does not bear responsibility) by the Rabbis directly frames the debate as one of financial obligation for replacement. The testimony of R. Yehoshua and R. Tzadok, "שאין בו לכהן כלום" (that the priest has nothing here), while synonymous in outcome, implies a complete lack of claim, rather than a specific achrayut doctrine. This subtle shift in leshon may hint at the historical development of the halakha, as noted by the Mishnat Eretz Yisrael.

Readings

Rambam: Hekesh to Pidyon Haben vs. L'fidiya Hikashtiv

The Rambam in his commentary to the Mishnah (Bekhorot 1:6:1, and similarly in Mishneh Torah, Hilkhot Bekhorot 1:6) provides a foundational understanding of the machloket:

המפריש פדיון פטר חמור ומת ר' אליעזר אומר כו': חייב באחריותו הוא שיהא חייב להביא טלה ביד כהן ואם מת הטלה קודם שיגיע ליד כהן חייב לשלם טלה אחר לכהן על דעת ר' אליעזר לפי שהוא מקיש בכור חמור לבכור אדם כמו שאמר ופטר חמור תפדה בשה וגו' וכל בכור בניך תפדה. וחכמים אומרים אך פדה תפדה את בכור האדם ואת בכור הבהמה הטמאה תפדה לפדיה הקשתיו ולא לדבר אחר. ועדות זה אמת והלכה בכולן כחכמים. (Rambam on Mishnah Bekhorot 1:6:1)

Translation: "One who designates redemption for a firstborn donkey and it dies, R. Eliezer says, etc. He is responsible, meaning he is obligated to bring a lamb to the Kohen. If the lamb dies before it reaches the Kohen's hand, he is obligated to pay another lamb to the Kohen according to R. Eliezer, because he compares the firstborn donkey to a firstborn human, as it states: 'and the firstborn of a donkey you shall redeem with a lamb' (Exodus 34:20) and 'and all the firstborn of your sons you shall redeem' (Numbers 3:13). And the Sages say: 'However, you shall surely redeem the firstborn of man, and the firstborn of an unclean animal you shall redeem' (Numbers 18:15) – 'I have compared it [only] for redemption, and not for anything else.' And this testimony is true, and the halakha in all cases is like the Sages."

Chiddush: Rambam clearly articulates that R. Eliezer's position stems from a hekesh (analogy) between pidyon peter chamor and pidyon haben, particularly regarding the owner's achrayut. Just as one is responsible for the pidyon haben money until it reaches the Kohen, so too for the peter chamor lamb. The Rabbis, however, accept a very limited hekesh from the verse "אך פדה תפדה" (Numbers 18:15) – the comparison is only to the fundamental act of redemption itself (lifdiya hikashtiv), but not to ancillary laws like achrayut. Rambam concludes decisively that the halakha follows the Rabbis.

Tosafot Yom Tov: Deeper into the Hekesh and its Limitations

The Tosafot Yom Tov delves into the precise nature of the Rabbis' limitation on the hekesh, particularly challenging the Rambam's formulation. He quotes Rambam and Rav (Ovadia MiBartenura) regarding "לפדייה הקשתיו" (I have compared it for redemption):

וחכ"א אין חייבים באחריותו. כתב הר"ב אך פדה תפדה כו'. לפדייה הקשתיו ולא לדבר אחר. וכ"כ הרמב"ם. וכן כתבו עוד גם שניהם ברפ"ז דעדיות. ותימה דא"כ למאי הוקש כלל דלפדייה גופה בהדיא כתיב ובגמרא לא אמרו לפדייה הקשתיו. אלא לר"א אסיפא דיקבר. כמ"ש שם בס"ד. ובהדיא אמרינן בגמרא. אדרמי ברייתות אהדדי בזמן פדיון פטר חמור. וקאמר רבא. הא ר"א דמקיש הא רבנן דלא מקשי. הלכך טעמייהו דרבנן דלא ס"ל להקישא כלל. והא דפירשו הרמב"ם והר"ב בר"פ. אך פדה תפדה וגומר. כל שישנו בבכור אדם ישנו בבכור בהמה טמאה. ורבא אמר הכי התם בגמרא. לאו הקישא דפדייה הוא. אלא שלא חייבה התורה בבכור בהמה טמאה אלא למחויב בבכור אדם אבל פדייה עצמה לא הוקשה כלל לרבנן: (Tosafot Yom Tov on Mishnah Bekhorot 1:6:2)

Translation: "And the Sages say, 'He does not bear responsibility.' The Rav (Ovadia MiBartenura) wrote: 'However, you shall surely redeem...' (Numbers 18:15) 'I have compared it [only] for redemption and not for anything else.' And so too wrote the Rambam. And so both of them wrote again at the end of Chapter 7 of Eduyot. And it is difficult: if so, for what was it compared at all? For redemption itself is written explicitly! And in the Gemara, they did not say 'I have compared it for redemption.' Rather, for R. Eliezer, it refers to the latter part of the Mishnah: 'it must be buried,' as written there, b'siyata d'Shmaya. And it is explicitly stated in the Gemara, that baraitot are contrasted concerning the time of pidyon peter chamor. And Rava says: 'This is R. Eliezer who compares, this is the Rabbis who do not compare.' Therefore, the Rabbis' reason is that they do not hold of the hekesh at all. And that which Rambam and the Rav explained at the beginning of the chapter: 'However, you shall surely redeem...' (Numbers 18:15) – 'whatever applies to a firstborn human applies to a firstborn impure animal' – and Rava said this there in the Gemara, it is not a hekesh for redemption itself. Rather, the Torah only obligated one who is obligated in pidyon haben for pidyon peter chamor, but redemption itself was not compared at all according to the Rabbis."

Chiddush: TYT raises a profound kushya: If the hekesh is "only for redemption," what's the point? The mitzvah of pidyon is explicitly stated for both! He then clarifies the Gemara's (Bekhorot 13b) position: R. Eliezer indeed makes a hekesh, while the Rabbis do not make a hekesh at all for achrayut. He reinterprets the Rambam/Rav's "לפדייה הקשתיו" to mean that the hekesh from "אך פדה תפדה" is only about who is obligated (e.g., only one obligated in pidyon haben is obligated in peter chamor), but not about the mechanism or achrayut of redemption itself. This refines the understanding of the Rabbis' stance to a complete rejection of the hekesh for achrayut.

Rashash: Reconciling TYT's Kushya

The Rashash, in his glosses, addresses the Tosafot Yom Tov's kushya directly:

ברע"ב ד"ה כפדיון מע"ש כו' וחכ"א כו' לפדייה הקשתיו כו'. ותמה התוי"ט דלענין איזו פדייה הוקשו ע"ש. ול"נ דכוונתם על ההיקש דא"ר לעיל (ד') לפטור כהנים ולוים מבכור בהמה טמאה וכדמסיק התוי"ט בעצמו. ור"ל דוקא לענין עיקר חיוב פדייה כגון לפטור כהנים ולוים. וכן לענין במה שיהיה הפדייה כדאיתא שם (ע"ב) מה בכור אדם לא חלקת בין לדורות כו' וזה ההיקש הוא לכ"ע דהא מיניה ילפינן הא דפודה בו פעמים הרבה ועיין בתוספות שם ד"ה אם. וזה נראה דאישתמיט מהתוי"ט במחכ"ת: (Rashash on Mishnah Bekhorot 1:6:1)

Translation: "On Rabbeinu Ovadia of Bartenura d.h. 'like pidyon ma'aser sheni, etc.' and 'the Sages say, etc. "I have compared it for redemption," etc.' And the Tosafot Yom Tov was puzzled, asking for which redemption were they compared, see there. And it seems to me that their intention was the hekesh that Rava mentioned above (Bekhorot 4a) to exempt Kohanim and Levi'im from peter chamor, as the Tosafot Yom Tov himself concludes. And it means specifically regarding the main obligation of redemption, such as to exempt Kohanim and Levi'im. And also regarding how the redemption is performed, as stated there (Bekhorot 7b): 'just as for a firstborn human you do not distinguish between generations, etc.' And this hekesh is accepted by all, for from it we derive that one can redeem with it many times. And see Tosafot there d.h. 'Im.' And it seems that this escaped the Tosafot Yom Tov, with due respect."

Chiddush: The Rashash offers a terutz to TYT's kushya by suggesting that Rambam and Rav's "לפדייה הקשתיו" does not refer to the achrayut hekesh at all, nor even to the basic obligation as per TYT's reinterpretation. Rather, it refers to other universally accepted hekeshim between pidyon haben and peter chamor, such as the exemption of Kohanim and Levi'im (Bekhorot 4a) or the ability to use the same lamb for multiple redemptions (podeh bo pe'amim harbeh, Bekhorot 7b). These are aspects of pidyon that are derived from a hekesh and are accepted by all, thus giving meaning to the phrase "לפדייה הקשתיו" without encountering TYT's difficulty regarding achrayut.

Friction

The Kushya on the Scope of the Hekesh

The most prominent kushya in this sugya is articulated by the Tosafot Yom Tov (on Mishnah Bekhorot 1:6:2) regarding the Rambam's (and Rav's) explanation of the Rabbis' view:

ותימה דא"כ למאי הוקש כלל דלפדייה גופה בהדיא כתיב ובגמרא לא אמרו לפדייה הקשתיו. Translation: "And it is difficult: if so, for what was it compared at all? For redemption itself is written explicitly! And in the Gemara, they did not say 'I have compared it for redemption.'"

The core of the kushya is this: If the Rabbis hold that the comparison (from "אך פדה תפדה" in Numbers 18:15) between pidyon haben and peter chamor is only for the act of pidyon itself ("לפדייה הקשתיו"), what is the chiddush? The Torah explicitly commands pidyon for both! Why would a hekesh be needed for something already clear from the pesukim? Furthermore, TYT notes that the Gemara (Bekhorot 13b) doesn't use this phrase in the context of the achrayut debate. This raises a fundamental challenge to the Rambam's explanation of the Rabbis' reasoning.

The Terutzim

Terutz 1: Rashash's Reinterpretation of "לפדייה הקשתיו"

The Rashash (on Mishnah Bekhorot 1:6:1), as noted above, offers a compelling resolution. He suggests that Rambam and Rav, when stating "לפדייה הקשתיו," are not referring to the basic mitzvah of pidyon itself, nor even to the achrayut debate. Instead, they are referring to other specific halakhot related to pidyon that are derived through a hekesh between pidyon haben and peter chamor, and are accepted by all Tannaim. These include:

  1. Exemption of Kohanim and Levi'im: The Gemara (Bekhorot 4a) derives the exemption of Kohanim and Levi'im from pidyon peter chamor through a hekesh to pidyon haben. This is a crucial aspect of the "main obligation of redemption" that is indeed derived from a comparison.
  2. Multiple Redemptions: The halakha that one can use the same lamb to redeem multiple peter chamorim (podeh bo pe'amim harbeh) is also derived from a hekesh to pidyon haben (Bekhorot 7b).

Thus, according to the Rashash, "לפדייה הקשתיו" does not mean "I have compared them only for the existence of the mitzvah of pidyon," but rather "I have compared them for specific details within the framework of pidyon that are not explicitly stated for peter chamor but are for pidyon haben." This terutz preserves the integrity of Rambam's statement while addressing TYT's logical difficulty.

Terutz 2: Tosafot Yom Tov's Gemara-Based Understanding

The Tosafot Yom Tov himself offers an alternative terutz (or rather, a deeper Gemara-based understanding) immediately after his kushya. He explains that the Gemara (Bekhorot 13b) differentiates between R. Eliezer, who does make a hekesh for achrayut, and the Rabbis, who do not make a hekesh at all regarding this specific matter. He reinterprets Rambam's "לפדייה הקשתיו" to mean that the hekesh is only for who is obligated (e.g., only one obligated in pidyon haben is obligated in peter chamor), but not for the achrayut of the redemption itself. The Gemara applies the phrase "לפדייה הקשתיו ולא לדבר אחר" not to the achrayut directly, but to resolve a kushya on R. Eliezer's view in the seifa of the Mishnah (Bekhorot 1:7). Abaye asks R. Eliezer: If you compare peter chamor to pidyon haben, why is the donkey buried? Just as pidyon haben money is permitted for benefit before redemption, the donkey should be too. Rava answers that R. Eliezer's hekesh is "לפדייה הקשתיו ולא לדבר אחר" – meaning, the comparison is only for the achrayut of the pidyon (that the owner is responsible for the lamb), but not for hana'a (that the donkey would be permitted for benefit). This shows a nuanced, internal limitation of R. Eliezer's hekesh itself, rather than a general Rabbinic rejection of the hekesh's scope.

Intertext

Pidyon Haben as the Paradigm for Achrayut

The Mishnah itself explicitly draws a parallel between the achrayut for peter chamor and five sela of pidyon haben (Mishnah Bekhorot 1:6). The mitzvah of pidyon haben (Numbers 3:47, 18:15) requires the father to pay five sela to a Kohen for his firstborn son. The halakha regarding pidyon haben is that if the money is designated but lost before reaching the Kohen, the father remains obligated to provide new funds (Mishnah Bekhorot 8:8). This serves as the textual and conceptual basis for R. Eliezer's position, underscoring the enduring financial obligation until the pidyon is complete.

Pidyon Ma'aser Sheni as the Paradigm for No Achrayut

Conversely, the Rabbis' position that the owner "does not bear responsibility" is likened to the redemption of ma'aser sheni (Mishnah Bekhorot 1:6). Ma'aser sheni produce, which must be eaten in Jerusalem or redeemed for money to be spent there (Deuteronomy 14:22-26), has a distinct halakha regarding its redemption money. If one designates money to redeem ma'aser sheni produce, and that money is subsequently lost or stolen, he is not obligated to provide new money. The original produce is considered chullin (desanctified) at the moment of designation, and the kedushah (sanctity) is transferred to the money. Once the money is gone, there is no further obligation. The Sifrei Devarim 107 (on Deuteronomy 14:25) discusses the nuanced halakhot of ma'aser sheni money, stating "כסף ראשון ולא כסף שני" (first money, not second money), which is interpreted by some (as alluded to by Mishnat Eretz Yisrael) as implying no achrayut for replacement funds. This serves as the Rabbis' counter-paradigm, emphasizing that kiddushin can transfer effectively upon designation, absolving the owner of further responsibility.

Mishnah Eduyot 7:1

The testimony of Rabbi Yehoshua and Rabbi Tzadok, "שאין בו לכהן כלום" (that the priest has nothing here), is also found in Mishnah Eduyot 7:1, albeit with a slightly different structure: there, the testimony is presented first, followed by the machloket of R. Eliezer and the Rabbis. This textual parallel is significant. The Mishnat Eretz Yisrael (on Mishnah Bekhorot 1:6:1-6) notes that the Mishnah in Bekhorot integrates this testimony into the broader achrayut debate, perhaps reflecting a "juridification" process where an original testimony evolved into a more formalized legal principle. This suggests that the halakha itself might have predated the articulated legal frameworks of achrayut and hekeshim, which were later developed to explain and systematize it.

Psak/Practice

The Rambam concludes unequivocally that "הלכה בכולן כחכמים" (the halakha in all cases is like the Sages, Mishneh Torah, Hilkhot Bekhorot 1:6). Therefore, in practice, if one designates a lamb for the redemption of a peter chamor and the lamb dies before being given to the Kohen, the owner is not obligated to replace it. The peter chamor is considered redeemed at the moment of designation. Consequently, the donkey itself would be chullin and not require burial, and the Kohen would have no claim to any replacement.

This psak reflects a broader meta-psak heuristic concerning kedushah and kiddushin. The Rabbis' view, adopted as halakha, underscores the principle that an act of hafrasha (designation or separation) can effectuate a complete transfer of kedushah or status, thereby shifting responsibility and rights. Unlike pidyon haben, where the kedushah is intrinsic to the child and the payment is a ransom, peter chamor functions more like ma'aser sheni, where the kedushah is transferred from the item to its designated redemption value, and upon that transfer, the original item is desanctified and the owner's obligation is fulfilled. This distinction profoundly impacts the legal and financial obligations of the owner.

Takeaway

The machloket over achrayut in pidyon peter chamor reveals a fundamental tension in halakha: does kiddushin take effect upon internal designation or external transfer? The halakha l'ma'aseh follows the Rabbis, emphasizing the power of designation for certain kedushot, while the broader sugya highlights the rigorous textual analysis required to delineate the precise scope and limitations of hekeshim.