Nedarim 57

Sugya Map

This sugya on Nedarim 57 delves into the intricate mechanics of nedarim (vows), particularly concerning the scope of their prohibition. At its heart lies the question of what constitutes "the forbidden item" when it undergoes transformation, replacement, or growth.

Core Issues

• Scope of Konam: How does the formulation of a neder (e.g., "This produce is konam upon me" vs. "That I will not eat it") affect the prohibition's reach to replacements (chilufin) and growths (gidulim)?
• Nature of Seed: The critical distinction between davar shezar'o kalah (an item whose seed perishes after sowing, like wheat) and davar she'ein zar'o kalah (an item whose seed does not perish, like onions or garlic). This distinction dramatically alters the din regarding gidulim and gidulei gidulin.
• Neutralization (Bitul): The Gemara's central ba'aya concerns whether a prohibited item (e.g., shevi'it onion) can be nullified by the growth of permitted material when the growth exceeds the original principal (gidulo merubah al ikaro). This raises fundamental questions about bitul be'rov across various issurim (prohibitions).

Nafka Minas

• Vows: Practical application for individuals making nedarim, determining the precise scope of what is forbidden.
• Teruma and Shevi'it: Halachic implications for the sanctity and permitted usage of produce grown from sanctified or prohibited seeds.
• Orla and Kilayim: Understanding the unique svarot (rationales) behind these distinct issurim and why they may not be subject to the same bitul rules as teruma or shevi'it.
• Meta-Halachic Principles: Clarification of when bitul be'rov applies, the concept of davar sheyesh lo matirin (an item that can be permitted), and issurim chatzuvim (inherent prohibitions) vs. issurei cheftza (object-based prohibitions).

Primary Sources

• Mishna: Nedarim 57a — Distinguishes between direct konam ("עלי," "על פי," "לפי") and konam qualified by "שאני אוכל," and details the din for zar'o kalah and zar'o lo kalah. Also presents complex conditional vows.
• Gemara: Nedarim 57a-b — Yishmael's ba'aya regarding shevi'it onion; R. Yitzchak Nappacha's initial resolution from R. Yannai's teruma ruling; R. Yirmiya/Zerika's challenge; counter-proofs from R. Yochanan (orla) and R. Yonatan (kilayim); R. Ami's resolution from R. Yitzchak/R. Yochanan on ma'aser; the Gemara's rejection of this proof; R. Shimon's baraita (not fully cited in prompt, but implied as the final resolution).

Text Snapshot

The Mishna at Nedarim 57a sets the stage for our sugya by outlining the fundamental distinctions in the scope of a neder:

מִשְׁנָה: הָאוֹמֵר: קונָם פֵּרוֹת הָאֵלּוּ עָלַי, קוֹנָם הֵן עַל פִּי, קוֹנָם הֵן לְפִי — אָסוּר בְּחִילּוּפֵיהֶן וּבְגִידּוּלֵיהֶן. שֶׁאֲנִי אוֹכֵל, שֶׁאֲנִי טוֹעֵם — מוּתָּר בְּחִילּוּפֵיהֶן וּבְגִידּוּלֵיהֶן. בְּדָבָר שֶׁזַּרְעוֹ כָּלֶה. אֲבָל בְּדָבָר שֶׁאֵין זַרְעוֹ כָּלֶה — אֲפִילּוּ גִּידּוּלֵי גִּידּוּלִין אֲסוּרִין.

(Nedarim 57a)

Dikduk/Leshon Nuance

1. "קונם פֵּרוֹת הָאֵלּוּ עָלַי, קוֹנָם הֵן עַל פִּי, קוֹנָם הֵן לְפִי": The Mishna provides three formulations for a general prohibition.

   • "עָלַי" (upon me): A straightforward declaration that the item is forbidden for my benefit.
   • "עַל פִּי" (upon my mouth): Similar to "עלי," but perhaps slightly more specific to consumption, though still broad enough to cover all benefit, as the Ran will explain.
   • "לְפִי" (to my mouth): Grammatically distinct, yet conveying the same broad prohibition of benefit. The common thread is that these phrases express a general issur hana'ah (prohibition of benefit) on the specific item ("הָאֵלּוּ" - these). This specificity is crucial, as we will see in the Rishonim.

2. "שֶׁאֲנִי אוֹכֵל, שֶׁאֲנִי טוֹעֵם": This introduces a crucial limitation. When the neder is phrased with "that I will eat" or "that I will taste," it explicitly limits the prohibition to the act of eating/tasting the original produce. This means chilufin (replacements) and gidulim (growths) are permitted, as one is not eating/tasting the original item itself.

3. "בְּדָבָר שֶׁזַּרְעוֹ כָּלֶה. אֲבָל בְּדָבָר שֶׁאֵין זַרְעוֹ כָּלֶה — אֲפִילּוּ גִּידּוּלֵי גִּידּוּלִין אֲסוּרִין": This is the Mishna's profound distinction.

   • Davar shezar'o kalah: Refers to items like wheat, where the sown seed disintegrates and becomes part of the soil, giving rise to an entirely new plant. In such a case, only first-generation growths are forbidden (if the neder was general), but gidulei gidulin (growths of growths) are permitted. The underlying svara is that the first growth is considered a "replacement" of the original forbidden item, but subsequent growths are too far removed.
   • Davar she'ein zar'o kalah: Refers to items like onions or garlic (as explained by Rashi), where the original bulb or root remains intact and merely expands or sprouts. Here, the original forbidden substance is still physically present within the "growths," even gidulei gidulin, hence the prohibition extends indefinitely. This implies that the original issur never truly dissipates or gets diluted.

This Mishna, particularly its distinction between seed types, forms the bedrock for the Gemara's ensuing debate about bitul and the nature of various prohibitions.

Readings

The Mishna on Nedarim 57a presents a clear distinction regarding the scope of a neder, especially concerning chilufin and gidulim. Our Rishonim offer profound insights into the underlying svarot.

Ran (Nedarim 57a:1:1) – The Specificity of "אלו" and the Nature of Chilufin

The Ran on Nedarim 57a, s.v. "מתני' קונם פירות האלו עלי," unpacks the very first clause of our Mishna, focusing on why chilufin and gidulim are prohibited when one says "קונם פירות האלו עלי." His central chiddush lies in connecting this specific formulation to the concept of hekdesh (sacred endowment) and differentiating it from a general vow.

The Ran explains:

משום דכיון שפרט הדברים הנאסרים עליו שוינהו עליה כהקדש ומש"ה מתסר בחילופיהן ובגידוליהן כי היכי דחלופי הקדש וגדוליו אסירי... דלא דמי לנודר סתם מן התאנים ומן הענבים שכיון שלא פרט ואסר עליו כל המין לא עשאם עליו הקדש שלא נתכוון אלא מאכילת אותו מין ומש"ה לא מתסר בחילופיהן ובגידוליהן אלא בפורט כי הכא דאמר פירות האלו... (Ran, Nedarim 57a, s.v. "מתני' קונם פירות האלו עלי")

Chiddush: The Ran posits that when one specifies "הָאֵלּוּ" (these) fruits, he treats them as if they were hekdesh. Just as chilufin and gidulim of hekdesh are prohibited, so too are those of a neder when specific items are named. This is fundamentally different from one who vows generally "מן התאנים ומן הענבים" (from figs and grapes). In the latter case, the vower does not designate specific items as forbidden per se, but rather prohibits himself from eating from that category. His intention is merely to refrain from eating that type of produce, not to imbue specific items with a kedusha-like prohibition that would extend to their chilufin and gidulim. Thus, the very act of poreit (specifying) transforms the nature of the neder from a personal restriction on consumption to an issur cheftza (prohibition on the object) akin to hekdesh.

The Ran then delves into a complex sfeka raised by Rami bar Chama (Nedarim 47b) regarding chilufin when another person makes the exchange. Rami bar Chama wonders whether the prohibition on chilufin is due to the kavanah (intention) of the vower (in which case only the vower is restricted), or because chilufin are inherently like gidulim (making it a general issur hana'ah on the item, irrespective of who exchanges it). The Ran resolves this by asserting that "אלו" is indeed davkka (precise). Even if we say the reason for chilufin being forbidden is that they are like gidulim (a general principle for issurei hana'ah), this applies only to the person who himself exchanges it. However, the Mishna states "אסור בחילופיהן ובגידוליהן" without qualification, implying that even if another person makes the exchange, the chilufin are forbidden. This broader prohibition, the Ran concludes, must stem from the specificity of "אלו," which creates an issur cheftza that extends to chilufin even when exchanged by others. Without "אלו," chilufin exchanged by another would not be forbidden. This demonstrates the profound legal weight given to the specific linguistic formulation of the vow.

Rashi (Nedarim 57a:1:1-3) – Defining the Seeds and Their Growth

Rashi provides the foundational definitions for the Mishna's critical distinction between zar'o kalah and zar'o lo kalah. While seemingly straightforward, Rashi's concise explanations are the bedrock upon which the entire sugya is built, especially the Ran's deeper lomdus.

Rashi on Nedarim 57a, s.v. "בדבר שזרעו כלה":

בקרקע וגדל כגון חטה וכיוצא בה דהיינו גידולין גמורין. (Rashi, Nedarim 57a, s.v. "בדבר שזרעו כלה")

Chiddush: Rashi clarifies that davar shezar'o kalah refers to plants like wheat, where the original seed sown in the ground completely decomposes or "ceases" to exist as a distinct entity. The subsequent growth is thus a "complete growth" (gidulin gemurim), entirely new matter that has replaced the original seed. This conceptualization means that the issur attached to the original seed does not physically persist in the new plant.

Rashi on Nedarim 57a, s.v. "אבל בדבר שאין זרעו כלה":

כגון השומים והבצלים שאינו כלה בקרקע אלא שרבה וגדל בגופו. (Rashi, Nedarim 57a, s.v. "אבל בדבר שאין זרעו כלה")

Chiddush: Conversely, davar she'ein zar'o kalah refers to items like garlic (shumim) and onions (b'tzalim). Here, the original bulb or clove does not decompose. Instead, it "multiplies and grows within its own body" (rabbah v'gadal b'gufo). The original forbidden substance remains physically intertwined with the new growth. This implies a direct, physical continuity of the issur.

Rashi on Nedarim 57a, s.v. "אפילו גידולי גידולין אסורין":

דכגופייהו דמו. (Rashi, Nedarim 57a, s.v. "אפילו גידולי גידולין אסורין")

Chiddush: Following from the previous point, Rashi explains that in davar she'ein zar'o kalah, even gidulei gidulin (growths of growths) are forbidden "דכגופייהו דמו" (because they are like the original body itself). This succinctly captures the essence of the din: the original forbidden item is still considered present and active, extending its prohibition indefinitely through all subsequent physical manifestations. Rashi's definitions are crucial for understanding why the dinim differ, laying the groundwork for the more complex bitul discussions in the Gemara.

Ran (Nedarim 57a:1:3) – Gidulei Gidulin and Davar Sheyesh Lo Matirin

The Ran on Nedarim 57a, s.v. "בדבר שזרעו כלה," builds upon Rashi's definitions and offers a sophisticated analysis of gidulei gidulin in both types of seeds, integrating the principle of davar sheyesh lo matirin.

The Ran explains the Mishna's "ובגידוליהן" (and its growths) implies only first-generation growths are prohibited in zar'o kalah:

וה"ק מאי דאמרי' ברישא אסור בגידוליהן דמשמע דוקא בגידוליהן מתסר אבל בגידולי גדולין שרי הני מילי בדבר שזרעו כלה... דכיון דגידולין בדבר שזרעו כלה כחליפין דמו כי היכי דחליפי חליפין מותרין כדמוכח לעיל בהשותפין גבי מכרן וקדש בדמיהן מקודשת ה"נ גידולי גידולין שרי. (Ran, Nedarim 57a, s.v. "בדבר שזרעו כלה")

Chiddush (Part 1): The Ran interprets the Mishna's phrasing "ובגידוליהן" (and its growths) as implying a limitation. In davar shezar'o kalah, only the first generation of growths is forbidden. Gidulei gidulin are permitted. The svara is that gidulim in zar'o kalah are conceptually similar to chilufin (replacements). Just as chilufei chilufin (replacements of replacements) are permitted – as demonstrated in Nedarim 47a regarding selling hekdesh and sanctifying the proceeds, where the money from the sale of the proceeds is not hekdesh – so too, gidulei gidulin in this context are permitted. This is a crucial distinction, as it limits the perpetual extension of the issur in cases where the original item has truly "ceased."

He then contrasts this with davar she'ein zar'o kalah:

אבל דבר שאין זרעו כלה בין ברישא בין בסיפא אפילו גידולי גידולין אסורים משום דכיון דאין זרעו כלה הרי בגידולי גידולין הללו מעורב בהן מן האיסור הראשון ונדרים הוה להו דבר שיש לו מתירין כדאמרי' בגמרא וכל דבר שיש לו מתירין אפילו באלף לא בטיל. (Ran, Nedarim 57a, s.v. "בדבר שזרעו כלה")

Chiddush (Part 2): In davar she'ein zar'o kalah, the Ran concurs with Rashi that gidulei gidulin are always prohibited. His explanation, however, adds a layer of depth: "הרי בגידולי גידולין הללו מעורב בהן מן האיסור הראשון" (for in these growths of growths, some of the original prohibition is mixed within them). Critically, he then connects this to a broader halachic principle: "ונדרים הוה להו דבר שיש לו מתירין כדאמרי' בגמרא וכל דבר שיש לו מתירין אפילו באלף לא בטיל" (and nedarim are considered davar sheyesh lo matirin, as stated in the Gemara, and any davar sheyesh lo matirin is not nullified even in a ratio of 1000:1). This is a profound insight. The Ran explains that since the original forbidden substance physically persists and mixes with the new growth, and nedarim can be annulled by a chacham (making them davar sheyesh lo matirin), the principle of bitul be'rov (nullification by majority) does not apply. The issur remains potent and un-nullified, even if the new permitted growth vastly outnumbers the original forbidden part. This elevates the discussion from a mere physical description of growth to a fundamental principle of bitul in halacha.

Tosafot (Nedarim 57a:1:2) – Konam and Prohibition of Benefit

Tosafot on Nedarim 57a, s.v. "אסור בחילופיהן ובגידוליהן," offers a brief yet significant clarification regarding the scope of the konam vow.

דכיון דהזכיר קונם סתם ולא הזכיר אכילה אסר עצמו בין בחילופיהן בין בגידוליהן. (Tosafot, Nedarim 57a, s.v. "אסור בחילופיהן ובגידוליהן")

Chiddush: Tosafot highlights that when one simply says "konam" without explicitly limiting the vow to "I will not eat" (achila), the neder automatically encompasses a broader prohibition of benefit (issur hana'ah), which includes chilufin and gidulim. This implicitly affirms the Ran's point about poreit creating an issur cheftza. The absence of the limiting phrase ("שאני אוכל") is what extends the prohibition, rather than the explicit mention of achila being the sole cause of prohibition. This confirms that the default understanding of konam on a specific item is broad, encompassing various forms of benefit and transformation.

Friction

The Gemara's discussion on Nedarim 57a-b regarding Yishmael's ba'aya is a classic lomdish friction point, exposing the nuanced and often seemingly contradictory principles governing bitul be'rov (nullification by majority) across different issurim.

The Strongest Kushya: Inconsistent Bitul Principles

Yishmael, a man of Kefar Yamma, raises a dilemma concerning a shevi'it (Sabbatical Year) onion uprooted in the Sabbatical Year and replanted in the eighth year. Its subsequent growth in the eighth year exceeds its original principal (gidulo merubah al ikaro). The question: Do the permitted gidulim (eighth-year growths) neutralize the prohibition of the shevi'it principal onion?

Rabbi Yitzchak Nappacha, in an attempt to resolve this, cites Rabbi Chanina Terita'a in the name of Rabbi Yannai: "An onion of teruma that one planted, if its growths exceeded its principal, it is permitted" (Nedarim 57b). The implication is that teruma (and by extension shevi'it) can be batel by rov of chulin gidulim.

However, Rabbi Yirmiya (or Rabbi Zerika) immediately challenges this: "Did the Master abandon the opinion of two Sages and conduct himself in accordance with the opinion of one Sage?" (Nedarim 57b). The Gemara then identifies these two Sages:

1. Rabbi Yochanan (on Orla): "A young vine... whose fruits are orla... that one grafted onto an old, permitted vine... even though it added two hundred times the number of fruits... the fruit that was on the younger vine before it was grafted is forbidden" (Nedarim 57b). This implies that orla fruit is not nullified even in a 200:1 ratio, let alone gidulo merubah al ikaro.
2. Rabbi Yonatan (on Kilayim): "An onion that one planted in a vineyard, creating a forbidden mixture... and then the vineyard was uprooted... it is forbidden" (Nedarim 57b). This suggests that the issur kilayim attached to the onion persists even after its original context of transgression is removed, and even if it subsequently grows in a permitted manner.

The Kushya: How can Rabbi Yannai's ruling regarding teruma (and its implied application to shevi'it) be reconciled with the rulings of Rabbi Yochanan on orla and Rabbi Yonatan on kilayim? These three issurim appear to present conflicting principles of bitul and the persistence of prohibition in the face of new, permitted growth.

• Why is teruma (and shevi'it) nullified by rov of gidulim, while orla is not, even at 200:1?
• Why does the issur kilayim persist on the onion even when the vineyard is uprooted, seemingly irrespective of gidulim? The svara of bitul be'rov seems inconsistent. The Gemara's subsequent attempt to resolve the ba'aya from ma'aser (tithed onions that yield a larger untithed crop must all be tithed, implying the growth neutralizes the original status) is also rejected because "perhaps it is different when the ruling is a stringency" (chumra) (Nedarim 57b). This further highlights the difficulty in establishing a consistent principle.

The Best Terutz: Distinguishing the Nature of the Issurim

The resolution lies in understanding the unique nature and svarot behind each issur. The Gemara, in its final (un-cited) resolution, likely distinguishes these cases based on the type of prohibition:

1. Teruma and Shevi'it (R. Yannai's case):

   • Nature of Issur: Both teruma and shevi'it are issurei cheftza (prohibitions attached to the object itself) that are generally subject to bitul be'rov. The original teruma onion or shevi'it onion is forbidden. When it is planted, and new, permitted chulin matter (eighth-year growth or non-teruma growth) develops from it, if this chulin growth exceeds the original forbidden ikar (principal), the ikar is nullified within the rov of permitted material.
   • Underlying Svara: The issur is on the substance. Once the prohibited substance is physically diluted and overwhelmed by a majority of permitted substance, it loses its prohibitory power. The Ran (Nedarim 57a, s.v. "בדבר שזרעו כלה") further explains that nedarim (and implicitly other issurei cheftza like teruma and shevi'it when the original item is zar'o lo kalah) are davar sheyesh lo matirin (can be permitted by hatorah or by the passing of time for shevi'it). However, this rule applies when the issur is identifiable or chashuv. When the original issur is not distinct (i.e., it is mixed and overwhelmed by a rov of heter), then bitul can occur, especially if the new growth is considered chulin. The Gemara's final conclusion regarding shevi'it from R. Shimon (Nedarim 57b, not fully cited in prompt) aligns with R. Yannai, indicating that the bitul applies.

2. Orla (R. Yochanan's case):

   • Nature of Issur: Orla is an issur inherent to the etz (tree/vine) itself for its first three years. It's not merely a prohibition on the fruit as a separate entity, but on the koach gidul (power of growth) of the young tree. When an orla branch is grafted onto a permitted tree, the issur remains with that branch and its inherent capacity to produce orla fruit during its three-year period.
   • Underlying Svara: The issur orla is not just a cheftza issur on the fruit, but an issur on the source of the fruit during its orla period. Even if the branch draws nourishment from the permitted parent tree and produces 200 times more fruit, the orla fruits that were originally on the young vine, or those that subsequently grow from the orla branch (during its orla years), retain their orla status. Some Rishonim explain that orla is davar sheyesh lo matirin (it will become permitted after three years), and thus ein bo bitul (it cannot be nullified) even with a large majority of heter. Others argue that orla is a davar chashuv (a significant item) that doesn't get nullified. The Ran (Chullin 97a) indeed applies davar sheyesh lo matirin to orla.

3. Kilayim (R. Yonatan's case):

   • Nature of Issur: Kilayim is an issur primarily on the ma'aseh zeri'ah (act of planting) or the presence of forbidden crops in a vineyard. It is a prohibition on the context and mingling. The issur "attaches" to the onion because it was planted in a forbidden manner.
   • Underlying Svara: Even if the vineyard is uprooted, the issur has already been incurred and is now inherent to the onion itself as a consequence of the transgression. It's not a matter of the onion's substance being nullified, but rather that the issur related to its forbidden planting remains. The onion, having been the subject of a kilayim transgression, retains a chashivut (significance) that prevents bitul. The issur is not on the substance that can be diluted, but on the item that facilitated the issur of kilayim. It's similar to treifah meat which remains treifah even if it grows and gains weight.

In essence, the Gemara's resolution (via R. Shimon) implicitly agrees that teruma and shevi'it (as issurei cheftza on the substance, not davar chashuv or davar sheyesh lo matirin in the context of bitul by rov growth) can be nullified. However, orla is an issur tied to the source or time-bound status, and kilayim is an issur tied to the act or context, rendering them immune to bitul by mere quantitative growth. The core distinction lies in whether the issur is on the item's substance subject to dilution, or on its nature, source, time, or transgressive history.

Intertext

The sugya on Nedarim 57 concerning the scope of vows and the principles of bitul and gidulim resonates across various domains of Halakha, from biblical commands to practical psak.

Tanakh: The Gravity of Vows – Bamidbar 30:3

The Mishna, in its latter cases, explicitly refers to the biblical source for the gravity of vows:

If she derived benefit from him before Passover and went to visit her father after Passover, she is liable for violating the prohibition of: He shall not profane his word (Numbers 30:3), as the condition was fulfilled and she violated the vow retroactively. (Nedarim 57a)

This verse, "לא יחל דברו ככל היוצא מפיו יעשה" (He shall not profane his word; according to everything that proceeds from his mouth, he shall do), forms the bedrock of the entire hilchot nedarim. Parallel: This verse underscores the fundamental principle that a person's spoken word, particularly in a vow, carries immense weight and creates a binding obligation. The Mishna's detailed discussion about the precise wording of a neder (e.g., "אלו" vs. "שאני אוכל") and its implications for chilufin and gidulim is a direct manifestation of this biblical imperative. The meticulous analysis of how far the prohibition extends is an effort to define "ככל היוצא מפיו" – what exactly did his mouth utter and what are its precise halachic consequences? The gravity of "לא יחל דברו" requires the precise and rigorous interpretation of every nuance in the vow's formulation, as explored by the Ran and others, to determine the exact scope of the prohibition.

Shulchan Aruch: Codifying Zar'o Kalah and Zar'o Lo Kalah – Yoreh De'ah 216:11-12

The Mishna's distinction regarding zar'o kalah and zar'o lo kalah is directly codified in Shulchan Aruch, Yoreh De'ah.

• Shulchan Aruch Yoreh De'ah 216:11:

  אם אמר: קונם פירות אלו עלי אסור בחילופיהן ובגידוליהן בדבר שזרעו כלה, אבל בגידולי גידולין מותר. (Shulchan Aruch, Yoreh De'ah 216:11) Parallel: This psak directly translates the first part of our Mishna. It reiterates that if one specifies "these fruits" as konam, chilufin and first-generation gidulim are forbidden if it's zar'o kalah. However, gidulei gidulin are permitted. This aligns with the Ran's interpretation that gidulim in zar'o kalah are like chilufin, and chilufei chilufin are permitted.

• Shulchan Aruch Yoreh De'ah 216:12:

  בדבר שאין זרעו כלה, אפילו גידולי גידולין אסורים. (Shulchan Aruch, Yoreh De'ah 216:12) Parallel: This psak likewise codifies the second part of the Mishna. For zar'o lo kalah, even gidulei gidulin are forbidden. This confirms Rashi's understanding that in such cases, the original forbidden substance is still physically present and "like the body itself" even in subsequent growths, and the Ran's additional point that nedarim are davar sheyesh lo matirin, thus preventing bitul by rov when the issur remains physically mixed. These sections of the Shulchan Aruch demonstrate the direct and enduring halachic impact of our sugya.

Responsa: Igrot Moshe Yoreh De'ah 2:90 – The Nuances of Bitul in Kilayim

While not directly on nedarim per se, the Gemara's discussion about bitul in kilayim finds extensive treatment in later poskim. Rav Moshe Feinstein, in Igrot Moshe Yoreh De'ah 2:90, discusses a case involving kilayim in a manner that illuminates the underlying svarot we saw in R. Yonatan's case.

Responsum Context: Rav Moshe addresses whether kilayim kerem (forbidden mixtures in a vineyard) can be nullified if, for example, a forbidden plant grows within a vineyard, and the permitted vineyard grows extensively around it. He tackles the question of whether the issur is solely on the forbidden plant, or also on the vineyard itself, or on the act of planting.

Parallel: Rav Moshe emphasizes that the issur kilayim is often not merely a cheftza issur that can be nullified by bitul be'rov. Rather, it is an issur that, once incurred, affects the entire area or the plants involved in a fundamental way. He notes that for kilayim, the issur is on the ma'aseh zeri'ah and the shehiya (allowing it to remain). This aligns with the Gemara's position in R. Yonatan's case, where the onion remains forbidden even after the vineyard is uprooted. The issur has become intrinsic to the onion due to its history of kilayim, and it cannot simply be "outgrown" or nullified by subsequent permitted growth. Rav Moshe's teshuva thus provides a modern psak that reiterates the unique and robust nature of the kilayim prohibition, distinguishing it from issurim more readily subject to bitul be'rov like teruma or shevi'it in certain contexts. It highlights that an issur can attach to an object not just due to its inherent nature, but due to its involvement in a forbidden act, making bitul more complex.

Psak/Practice

The sugya in Nedarim 57 provides critical foundational principles for understanding the scope of nedarim and the application of bitul across various issurim.

Halachic Landings

1. Specificity of Vows: The Mishna's distinction between "קונם פירות האלו עלי" and "שאני אוכל שאני טועם" is foundational. In practice, this means:

   • If a person makes a general vow (konam) on a specific item, the prohibition extends to its chilufin (replacements) and gidulim (growths) (Shulchan Aruch YD 216:11). The Ran's analysis that "אלו" makes it akin to hekdesh is the underlying svara.
   • If the vow explicitly limits itself to "that I will not eat/taste," then chilufin and gidulim are permitted, as the original item is no longer being consumed (Shulchan Aruch YD 216:10). This emphasizes that the precise leshon (wording) of a neder is paramount in determining its scope.

2. Zar'o Kalah vs. Zar'o Lo Kalah: This Mishnaic distinction is fully codified in Halakha (Shulchan Aruch YD 216:11-12).

   • For davar shezar'o kalah (e.g., wheat), only first-generation gidulim are forbidden. Gidulei gidulin (growths of growths) are permitted, as the original seed has perished, and subsequent growths are too far removed from the original issur (conceptually like chilufei chilufin).
   • For davar she'ein zar'o kalah (e.g., onions), gidulei gidulin are also forbidden, as the original forbidden substance physically remains and is intertwined with all subsequent growths. The Ran's explanation that nedarim are davar sheyesh lo matirin and thus not subject to bitul when the issur is physically present, provides the meta-halachic backing for this stringency.

3. Bitul Principles and Issurim: The Gemara's extensive debate regarding the shevi'it onion and the conflicting cases of teruma, orla, and kilayim highlights the nuanced application of bitul be'rov.

   • For teruma and shevi'it onions (when zar'o lo kalah), the consensus is that if the permitted gidulim exceed the forbidden ikar (principal), the issur is nullified. This is due to their nature as issurei cheftza that are subject to bitul when sufficiently diluted.
   • Orla and Kilayim are generally not nullified by rov of gidulim or by subsequent changes in their environment. This is because their issur is tied to the source (for orla), time-bound nature (for orla as davar sheyesh lo matirin), or transgressive act/context (for kilayim). The issur is not simply a substance to be diluted, but a more fundamental aspect of the item or its history.

Meta-Psak Heuristics

The sugya offers crucial heuristics for psak:

• Precision of Leshon: The exact wording of a vow or any halachic declaration is paramount. Every word can alter the scope and severity of a din.
• Davar Sheyesh Lo Matirin: This principle is a powerful tool. An issur that can eventually be permitted (e.g., by hatorah of a chacham for nedarim, or by time for orla) is generally not subject to bitul be'rov if the forbidden item remains identifiable or physically present. This rule safeguards against circumvention of issurim that have a built-in mechanism for permission.
• Nature of the Issur: The underlying svara of each issur dictates its dinim of bitul and persistence. One cannot apply a blanket rule for bitul across all issurim. Distinctions must be made between issurei cheftza (object-based), issurei gavra (person-based), issurei ma'aseh (act-based), or those tied to specific zmanim (times) or mekomot (places).

Takeaway

The scope of a neder is meticulously defined by its precise formulation and the biological nature of the vowed item. Beyond nedarim, this sugya serves as a masterclass in discerning the unique svarot governing bitul and the persistence of issur across the diverse landscape of Halakha, emphasizing that bitul is not a monolithic principle but context-dependent.