Mishnah Chullin 8:5-6

Sugya Map

• Issue: The kashrut status of rennet (קיבה) used for cheesemaking, particularly when derived from non-kosher sources like a gentile's animal or a neveila (carcass), and the halachic nature of milk found within an animal's stomach. This forms a critical sub-discussion within the broader sugya of basar bechalav (meat and milk) and gevinat akum (gentile cheese).
• Nafka Mina(s):
  • Permissibility of Cheese: Whether cheese made with rennet from non-kosher sources is permitted for consumption by Jews. This is the most direct practical consequence.
  • Defining "Meat": The underlying halachic question of whether rennet itself, especially in its dried or enzymatically active form, retains the status of basar (meat) for the purposes of basar bechalav, or if it is considered pirsha be'alma (mere waste/excretion), thereby circumventing meat-and-milk prohibitions.
  • Rationale for Gevinat Akum: The sugya delves into the historical reasons behind the rabbinic prohibition of gevinat akum, often attributed to the use of non-kosher rennet.
  • Milk in Stomach: The halachic status of milk found in the stomach of an animal (kavah) – whether it acquires the kashrut status of the host animal or retains the status of its source. This impacts cases like a kosher animal suckling from a tereifa (non-kosher due to defect) or vice versa.
• Primary Sources:
  • Mishnah Chullin 8:5-6
  • Mishnah Avodah Zarah 2:5
  • Talmud Bavli, Avodah Zarah 35a-b
  • Talmud Bavli, Chullin 116b
  • Tosefta Chullin 8:12-13
  • Rambam, Mishnah Commentary on Chullin 8:5 and Avodah Zarah 2:5
  • Rambam, Hilchot Ma'achalot Asurot 9:16
  • Tosafot Yom Tov on Mishnah Chullin 8:5
  • Rashba, Torat HaBayit HaAroch, Beit Gimmel, Shaar 4

Text Snapshot

The relevant lines from Mishnah Chullin 8:5-6 are:

• "קיבת עובד כוכבים ושל נבלה הרי זו אסורה." (Mishnah Chullin 8:5)
  • Dikduk/Leshon Nuance: "הרי זו אסורה" – "this is forbidden." The referent "זו" (this) refers to the cheese made with such rennet, not necessarily the kibah itself being inherently forbidden for all use. This nuance is critical for distinguishing between direct issur hana'ah (prohibition of benefit) on the kibah and an issur achila (prohibition of consumption) on the resultant cheese.
• "המעמיד חלב בעור של קיבה כשרה אם יש בה בנותן טעם הרי זו אסורה." (Mishnah Chullin 8:5)
  • Dikduk/Leshon Nuance: "עור של קיבה כשרה" – "the skin of a kosher kibah." This implies that even a kosher kibah can render cheese forbidden if it imparts flavor ("בנותן טעם"), suggesting a basar bechalav concern. This stands in contrast to the kibah of a neveila or gentile, where the issur might stem from the kibah's non-kosher origin rather than its "meatiness" for basar bechalav.
• "כשרה שינקה מן הטרפה קיבתה אסורה. וטרפה שינקה מן הכשרה קיבתה מותרת, מפני שהוא כנוס במעיה." (Mishnah Chullin 8:5)
  • Dikduk/Leshon Nuance: "קיבתה אסורה" / "קיבתה מותרת" – referring to the contents of the stomach (the milk), not the stomach itself. "מפני שהוא כנוס במעיה" – "because it is collected/contained in its intestines." This phrase is crucial. Grammatically, it appears to explain both clauses. Its implication is that the milk is not absorbed into the animal's flesh to become part of it; rather, it remains an independent entity, retaining the kashrut status of its original source. This is a fundamental principle for understanding the halacha of ingested substances.

Readings

Rambam: The Evolving Status of Rennet and the Gezeirah's Foundation

The Rambam, in his vast corpus, presents a fascinating evolution and nuanced understanding of the kashrut of rennet, particularly from non-kosher sources, reflecting the dynamic nature of halachic development. His commentary on our Mishnah in Chullin and his broader legal code, Mishneh Torah, offer distinct perspectives that require careful reconciliation, a task that has occupied subsequent Acharonim.

In his Mishnah Commentary on Chullin 8:5:1, the Rambam initially states quite explicitly regarding "קיבת עובד כוכבים ושל נבלה הרי זו אסורה":

"הקיבה ידוע וכבר ביארנו במסכת ע"ז שפסקו ההלכה שקיבה היא כמו הזבל ומותרת ומותר להעמיד החלב לכתחלה בקיבת עובד כוכבים ובקיבת נבלה מפני שהיא פירשא בעלמא" (Rambam on Mishnah Chullin 8:5:1)

Here, the Rambam asserts that kibah (rennet), whether from a gentile's animal or a neveila, is considered pirsha be'alma – mere waste or excretion. As such, it is not deemed "meat" for the purposes of basar bechalav, nor is it considered a forbidden food item in its own right in a way that would prohibit its use lechatchila (ab initio) for cheesemaking. He even permits using it lechatchila. This position suggests a highly lenient view: if the kibah is pirsha be'alma, it lacks the halachic significance to transfer issur to the milk it coagulates, even if it imparts flavor, as it is not truly basar and potentially not even an issur achila in its dried, enzymatic form. This initial stance aligns with the understanding that pirsha be'alma is exempt from tum'ah (ritual impurity) and other prohibitions that apply to actual food or animal products.

However, a significant tension arises when comparing this to his definitive ruling in Hilchot Ma'achalot Asurot 9:16, where he codifies the prohibition of gevinat akum (gentile cheese):

"גבינות העובדי כוכבים אסורות מפני שמעמידין אותן בקיבת נבילה" (Rambam, Hilchot Ma'achalot Asurot 9:16)

This ruling explicitly states that gevinat akum is forbidden because gentiles coagulate their cheese with kibat neveila. This clearly implies that kibat neveila does render cheese forbidden, directly contradicting the Mishnah Commentary's assertion that it is pirsha be'alma and muttar lechatchila.

The Kesef Mishneh (on Rambam, Hilchot Ma'achalot Asurot 9:16) and Tosafot Yom Tov (on Mishnah Chullin 8:5:1) are crucial in reconciling this apparent discrepancy. They explain that the Rambam's Mishnah Commentary reflects an earlier stage of halachic development, known as "קודם חזרה" (before the retraction/re-establishment of the halacha by R' Yehoshua). At this stage, the kibah was indeed considered pirsha be'alma and permitted. However, the Mishneh Torah reflects the final, codified halacha of "לאחר חזרה" (after the retraction), where the Sages, specifically R' Yehoshua, established a gezeirah (rabbinic decree) prohibiting gevinat akum precisely due to the concern of kibat neveila (or kibat egley avodah zarah, rennet from calves used for idolatry). Thus, the Mishnah Commentary preserves the historical, initial halachic assessment, while the Mishneh Torah presents the binding psak that incorporates the later rabbinic decree. This approach highlights the Rambam's dual role as both a commentator elucidating the text's historical layers and a codifier presenting the final halacha.

Furthermore, the Rambam's understanding of "כשרה שינקה מן הטרפה קיבתה אסורה" (a kosher animal that suckled from a tereifa, its stomach contents are forbidden) is consistent with the principle that milk, even within an animal's stomach, retains its source's kashrut status. The phrase "מפני שהוא כנוס במעיה" (because it is collected in its intestines) means it's not integrated into the host's body and thus doesn't become basar. However, if the source is tereifa, the milk is tereifa. This is not a basar bechalav issue, but an issur tereifa issue. The Rambam's rigor in categorizing issurim and tracking their historical evolution is a hallmark of his approach.

Tosafot Yom Tov: Chronological Layers and Definitional Nuances

The Tosafot Yom Tov provides a critical meta-analysis of the Mishnah, serving as a bridge between the Rishonim and the reader, especially in his engagement with the Rambam and the Gemara's resolution. His commentary on Mishnah Chullin 8:5 focuses on the inherent contradictions within the sugya and their resolution.

Regarding "קיבת נכרי ושל נבלה הרי זו אסורה," the Tosafot Yom Tov immediately points to the kushya (difficulty) arising from Mishnah Avodah Zarah 2:5, which discusses gevinat akum. He states:

"בגמרא מקשינן אהא דאמרינן בפ"ב דע"ז במתני' ה' דטעמא דאסרו גבינה של נכרים. מפני שמעמידין אותה בעור קיבה של נבילה וכדכתב הר"ב התם והכא. ומשמע הא קיבה גופה שריא. ומשנינן ל"ק כאן קודם חזרה כאן לאחר חזרה דרבי יהושע דהתם במשנה" (Tosafot Yom Tov on Mishnah Chullin 8:5:1)

The Tosafot Yom Tov explicitly highlights the Gemara's resolution in Avodah Zarah 35a-b: the Mishnah in Avodah Zarah reflects the halacha "לאחר חזרה" (after R' Yehoshua's retraction/re-establishment), where gevinat akum (and by extension, rennet from neveila) was prohibited. Our Mishnah in Chullin, by stating "הרי זו אסורה," also reflects this later, more stringent halacha. The kushya is that elsewhere, R' Yehoshua seems to have been lenient. The Gemara resolves this by positing a chronological development: R' Yehoshua initially held a lenient view ("קודם חזרה"), but later retracted ("לאחר חזרה"). This concept of chazara is pivotal for understanding the dynamic nature of halachic decrees.

The Tosafot Yom Tov then critically engages with the Rambam's Mishnah Commentary:

"מ"ש הר"ב בשם הרמב"ם בקיבה עצמה דנבלה דהיינו החלב הקרוש כו'. לא דק. דלהרמב"ם אין חילוק בין קרוש לצלול. וכמו שכתב בטור סי' פ"ז." (Tosafot Yom Tov on Mishnah Chullin 8:5:2)

Here, the Tosafot Yom Tov challenges a potential misinterpretation of the Rambam, clarifying that for the Rambam, the status of pirsha be'alma for kibah does not depend on whether the milk within it is solidified (karush) or liquid (tzalul). The essence of pirsha be'alma is its separation from the animal's guf (body), not its physical state. This is a subtle yet crucial point, as it underscores that the halachic category is about fundamental identity, not superficial appearance.

Crucially, the Tosafot Yom Tov brings the Ran's explanation for the cases of "כשרה שינקה מן הטרפה... וטרפה שינקה מן הכשרה":

"וכתב הר"ן דהיינו טעמא דחלב הכנוס בבהמה לאו כבהמה בנמצא בה דיינינן ליה אלא הרי הוא כמונח בקערה ודינו כמקום שבא משם ודין חלב גמור יש בו לכל דבר. ומאי דאמרינן בפ"ב דמס' ע"ז [דף כ"ט] דפירשא בעלמא הוא [כמ"ש הר"ב שם בקיבת עגלי ע"ז] לאו למימרא שיהא כפרש. דהא אסרינן ליה בהדיא בתר חזרה דקתני כשירה שינקה מן הטרפה אסורה אלא הכי קאמרינן שפורש מגופה ואינו כגופה." (Tosafot Yom Tov on Mishnah Chullin 8:5:2, quoting Ran)

The Ran's chidush is foundational: milk collected in an animal's stomach is not considered part of the animal itself. It's akin to milk placed in a bowl, retaining the kashrut status of its origin. This principle explains why milk from a tereifa animal, even if found in a kosher animal's stomach, is forbidden, and conversely, milk from a kosher animal, even if found in a tereifa's stomach, is permitted. The Ran further clarifies the term pirsha be'alma: it doesn't mean it's literally dung, but rather that it is separate from the animal's body, not an integral part of its flesh, which is why it retains its original halachic identity. This distinction is vital for understanding the scope of various issurim.

Mishnat Eretz Yisrael (Prof. Z. Safrai): Historical and Sociological Dimensions

The Mishnat Eretz Yisrael commentary, particularly the work of Prof. Ze'ev Safrai, offers a distinct, historically-informed and often sociological lens through which to interpret the Mishnah. This approach moves beyond purely technical halachic arguments to explore the broader context and motivations behind rabbinic decrees.

Safrai begins by contextualizing the practice of cheesemaking:

"בכפר המסורתי נהגו להכין גבינה בעזרת קיבת בהמה או צאן... כיום אנו יודעים שבקיבה משתמרים אנזימים פעילים המזרזים את תהליך הגיבון. קדמונינו לא ידעו להגדיר את הסיבה, אך הכירו ביעילות הקיבה." (Mishnat Eretz Yisrael on Mishnah Chullin 8:5:1-3)

This sets the stage by acknowledging the ancient and practical use of rennet, linking it to modern scientific understanding of enzymes. This perspective suggests that while the ancients didn't have the scientific terminology, their halachic discussions implicitly grappled with the biological reality of noten ta'am (imparting flavor) from these active agents. Safrai notes that the Mishnah implies that a dry kibah is not considered basar for basar bechalav purposes, as the concern with "עור של קיבה כשרה אם יש בה בנותן טעם" only arises if it's still moist and fleshy enough to impart a meat flavor, not just enzymatic action.

Safrai's most significant chidush lies in his interpretation of the gezeirah of gevinat akum and R' Yehoshua's evasive responses in Mishnah Avodah Zarah 2:5. He argues that the prohibition was not primarily a technical halachic concern about kibat neveila as basar or issur hana'ah, but rather a sociological decree:

"התלמוד מגדיר את ההחלטה כ"גזירה" ומסביר שהיא גזרה חדשה, ואין "מפקפקין" בגזרה חדשה... הטעם ודאי אינו חשש עבודה זרה, משום שחשש כזה היה גורם להחמרה נוספת... ההרחקה מקיבת גוי עשויה לנבוע מרצון להתרחק מהנכרי, אבל כפי שראינו האיסור כולל גם טרפה הנמצאת בביתו של יהודי. על כן יש להסביר שהאיסור נקבע במסגרת דיני המקדש, ומתוך רצון להדר בקרבנות... לכך הצטרף בשלב שני הרצון להתרחק משיתוף פעולה עם נכרי." (Mishnat Eretz Yisrael on Mishnah Chullin 8:5:4-14)

Safrai posits that the initial gezeirah was part of a broader social agenda to prevent mingling with non-Jews ("למנוע סעודות משותפות"), or perhaps to maintain a high standard of ritual purity related to the Temple service ("דיני המקדש"). The specific concerns about kibat neveila or kibat egley avodah zarah became the "לבוש הלכתי-טכני" (halachic-technical garb) for this underlying social or ritual objective. R' Yehoshua's reluctance to provide a direct, satisfying answer to R' Yishmael's probing questions, according to Safrai, stems from the fact that there was no purely technical halachic justification that would withstand rigorous legal scrutiny.

The concept of "חזרו לומר" (they returned to say) found in the Tosefta (Chullin 8:12) is central to Safrai's argument. This Tosefta states: "קיבה של נכרי ושל נבלה הרי זו אסורה, חזרו לומר מעמידין בקיבת נכרי ובקיבת נבלה ואין חוששין." This indicates a later reversal of the gezeirah, permitting the use of kibat neveila. Safrai interprets this "חזרו לומר" as a "ניצחון הדרך המשפטית" (victory of the legalistic approach). As the social or Temple-related concerns waned, the initial technical assessment of kibah as pirsha be'alma reasserted itself, leading to a relaxation of the decree. This highlights the dynamic tension between strict legal reasoning and broader rabbinic policy.

Regarding "כשרה שינקה מן הטרפה קיבתה אסורה," Safrai notes the Yerushalmi states this reflects "משנה ראשונה" (an earlier Mishnah), and the Bavli also indicates a later shift. He argues that this initial stringency might have stemmed from the Mקדש-centric view (as seen in R' Chanina ben Antigonus regarding sacrifices). The later halacha (post-chazara of the chazara), as found in the Bavli (Chullin 116b), allows even the milk in a kosher animal that suckled from a tereifa, because that milk is now also considered pirsha be'alma in the looser sense of "not meat," and therefore not forbidden even if it came from a tereifa. This demonstrates a shift from a ritualistic stringency to a more lenient, purely halachic-technical understanding for everyday chullin.

Rashba: Noten Ta'am and the Integrity of Issur Hana'ah

The Rashba (Rabbi Shlomo ben Aderet), particularly in his Torat HaBayit HaAroch, offers a rigorous halachic analysis of the sugya, focusing on the principles of noten ta'am (imparting flavor) and the nature of issur hana'ah (prohibition of benefit). His approach is characterized by a detailed examination of the interplay between various issurim and their implications for bitul (nullification).

The Rashba directly addresses the issue of kibat neveila and gevinat akum. He grapples with the Gemara's resolution of "קודם חזרה" and "לאחר חזרה" and the specific reasons for the gezeirah. The core question for the Rashba is whether the issur of kibat neveila is strong enough to prohibit cheese even if it's less than kedei noten ta'am (enough to impart flavor) or if it's batel be'shishim (nullified in 60 parts).

The Rashba would argue that if kibat neveila is pirsha be'alma and merely imparts flavor, then it should logically be batel be'shishim like other issurei achila (prohibitions of consumption). However, the fact that gevinat akum is prohibited suggests a more fundamental issur. The Gemara in Avodah Zarah 35b considers two main reasons for the gezeirah:

1. Kibat Neveila: Rennet from an unslaughtered carcass. A neveila is assur be'hana'ah (forbidden for benefit). If the kibah is considered part of the neveila and thus assur be'hana'ah, then even a minute amount would prohibit the entire mixture, as issur hana'ah is generally not subject to bitul.
2. Kibat Egley Avodah Zarah: Rennet from calves designated for idolatry. These are also assur be'hana'ah and would similarly prohibit the cheese.

The Rashba would lean towards the interpretation that the gezeirah on gevinat akum is due to the issur hana'ah inherent in the kibat neveila or kibat egley avodah zarah. If the rennet itself is assur be'hana'ah, then any benefit derived from it, including its use as a coagulant, is forbidden. This type of issur would indeed prohibit the cheese, regardless of whether the rennet is pirsha be'alma or if it imparts a discernible taste. This aligns with the principle that issur hana'ah is not subject to bitul in the same way as issur achila.

Furthermore, the Rashba would emphasize the nuance in "המעמיד חלב בעור של קיבה כשרה אם יש בה בנותן טעם הרי זו אסורה." This clause addresses a kosher rennet that still has a meat taste. Here, the issur is clearly basar bechalav, which is subject to noten ta'am and bitul be'shishim. This distinction is crucial: the gezeirah on gevinat akum is not merely a basar bechalav concern (which would be subject to bitul), but rather a more fundamental issur hana'ah or a rabbinic decree that bypasses bitul. This rigorous analysis of the nature of the issur and its interaction with bitul principles is characteristic of the Rashba's lomdus.

Friction

Kushya 1: The Paradox of Pirsha Be'alma and the Gezeirah's Scope

Challenge: The Rambam, in his Mishnah Commentary, explicitly states that kibat neveila (rennet from a carcass) is "פירשא בעלמא" (mere waste/excretion) and "מותר להעמיד החלב לכתחלה" (permitted ab initio to coagulate milk with it). Yet, the accepted halacha, codified by the Rambam himself in Mishneh Torah (Hilchot Ma'achalot Asurot 9:16), prohibits gevinat akum (gentile cheese) precisely "מפני שמעמידין אותן בקיבת נבילה" (because they coagulate it with kibat neveila). This presents a glaring contradiction: if kibat neveila is pirsha be'alma and permissible for cheesemaking, why is its use by gentiles the very reason for prohibiting their cheese? Furthermore, what exactly does pirsha be'alma entail? If it truly is mere waste, why should it ever be problematic, even rabbinically? If it's not truly waste, how can the Rambam categorize it as such?

Terutz 1: The Chronological Shift of "קודם חזרה" and "לאחר חזרה" (Kesef Mishneh/Tosafot Yom Tov)

The most widely accepted resolution, articulated by the Kesef Mishneh on Rambam (Hilchot Ma'achalot Asurot 9:16) and echoed by the Tosafot Yom Tov (on Mishnah Chullin 8:5:1), posits a chronological development in the halacha. The Gemara in Avodah Zarah 35a-b explicitly introduces the concept of "קודם חזרה" (before the retraction/re-establishment of the halacha by R' Yehoshua) and "לאחר חזרה" (after the retraction).

• "קודם חזרה": Initially, R' Yehoshua (and presumably the prevailing halacha) considered kibat neveila to be pirsha be'alma. In this state, it was not deemed "meat" for basar bechalav purposes, nor was it considered a food item with intrinsic issur that could prohibit the cheese. Thus, its use for cheesemaking was permitted lechatchila. The Rambam's Mishnah Commentary captures this earlier halachic assessment, reflecting the literal meaning of the kibah's physical and halachic status as a separated, non-food entity.
• "לאחר חזרה": Subsequently, R' Yehoshua "retracted" or re-established the halacha, instituting a gezeirah (rabbinic decree) prohibiting gevinat akum. The primary reasons for this gezeirah were concerns about the use of kibat neveila or kibat egley avodah zarah (rennet from calves sacrificed to idols). Even if the kibah was still considered pirsha be'alma in a strict definitional sense (i.e., not basar for basar bechalav), the gezeirah imposed a new layer of prohibition. This later, more stringent halacha is what the Rambam codifies in Mishneh Torah.

The Ran (quoted by Tosafot Yom Tov on Chullin 8:5:2) further clarifies the meaning of pirsha be'alma in this context: "לאו למימרא שיהא כפרש... אלא הכי קאמרינן שפורש מגופה ואינו כגופה." It doesn't mean it's literally dung, but rather that it is separate from the animal's guf (body) and not an integral part of its flesh. This separation is why it retains its original status (e.g., milk from a tereifa is tereifa milk, even in a kosher animal). The gezeirah didn't redefine pirsha be'alma, but rather decreed that even if it is pirsha be'alma, its use in gevinat akum is prohibited due to the origin of the kibah. The issur is not on the kibah as basar, but on the kibah as an item from a neveila (which is assur be'hana'ah) or from avodah zarah. The gezeirah is thus a safeguard, not a re-categorization of the kibah's fundamental nature.

Terutz 2: Sociological vs. Technical Halacha (Mishnat Eretz Yisrael - Safrai)

Prof. Ze'ev Safrai, in Mishnat Eretz Yisrael, offers a complementary, though perhaps more radical, interpretation. He suggests that the gezeirah of gevinat akum (and by extension, the prohibition of kibat neveila) was not primarily rooted in a purely technical halachic concern about kibat neveila as basar or issur hana'ah. Instead, it was a sociological or meta-halachic decree:

"ההרחקה מקיבת גוי עשויה לנבוע מרצון להתרחק מהנכרי, אבל כפי שראינו האיסור כולל גם טרפה הנמצאת בביתו של יהודי. על כן יש להסביר שהאיסור נקבע במסגרת דיני המקדש, ומתוך רצון להדר בקרבנות... לכך הצטרף בשלב שני הרצון להתרחק משיתוף פעולה עם נכרי." (Mishnat Eretz Yisrael on Mishnah Chullin 8:5:4-14)

Safrai argues that the gezeirah served to "למנוע סעודות משותפות" (prevent shared meals) with gentiles, thereby preserving Jewish distinctiveness, or perhaps to maintain a high standard of purity related to the Temple service (dinay HaMikdash). The specific halachic justifications (like kibat neveila) were "לבוש הלכתי-טכני" (halachic-technical garb) to enforce this broader agenda. The fact that R' Yehoshua evaded R' Yishmael's questions in Avodah Zarah 35a-b, according to Safrai, supports this: R' Yehoshua could not provide a fully satisfying technical reason because the decree's true rationale was not strictly technical.

In this light, the Rambam's initial "פירשא בעלמא" in his Mishnah Commentary reflects the technical truth about the kibah's status. The subsequent gezeirah ("לאחר חזרה") in Mishneh Torah is an administrative decree overriding this technical permission for policy reasons. The Tosefta (Chullin 8:12) that states "חזרו לומר מעמידין בקיבת נכרי ובקיבת נבלה ואין חוששין" would then represent a later retraction of the gezeirah itself, a "ניצחון הדרך המשפטית" (victory of the legalistic approach) as the social or ritual motivations for the gezeirah waned, allowing the original technical status of pirsha be'alma to reassert itself. This interpretation offers a compelling explanation for the dynamic nature of halacha and the interplay between its legal, historical, and sociological dimensions.

Kushya 2: The Scope and Consistency of "כנוס במעיה"

Challenge: The Mishnah states: "כשרה שינקה מן הטרפה קיבתה אסורה. וטרפה שינקה מן הכשרה קיבתה מותרת, מפני שהוא כנוס במעיה." The phrase "מפני שהוא כנוס במעיה" (because it is collected/contained in its intestines) is placed at the end, seemingly applying to both clauses. However, if this phrase implies that the milk retains its source's kashrut status because it's not absorbed, why is the kibah of the kosher animal that suckled from a tereifa forbidden? If the milk is merely "כנוס במעיה," it should be considered distinct, and the kosher host animal's kashrut status should not be affected beyond the presence of the forbidden milk itself, which could simply be removed. Conversely, what is the chidush in stating that a tereifa suckling from a kosher animal yields permitted milk, if the milk is simply "כנוס במעיה" and always retains its source's status? Is this not self-evident? This implies a nuance in "כנוס במעיה" or a deeper halachic principle at play.

Terutz 1: Milk's Independent Status, Explicitly Declared (Ran/Tosafot Yom Tov)

The Ran (quoted by Tosafot Yom Tov on Mishnah Chullin 8:5:2) provides the classic explanation, clarifying the independent halachic status of milk contained within an animal's stomach.

"דחלב הכנוס בבהמה לאו כבהמה בנמצא בה דיינינן ליה אלא הרי הוא כמונח בקערה ודינו כמקום שבא משם ודין חלב גמור יש בו לכל דבר." (Ran, as cited by Tosafot Yom Tov on Mishnah Chullin 8:5:2)

The chidush of "מפני שהוא כנוס במעיה" is precisely to establish this principle: the milk is not transformed into the host animal's guf (body) or flesh. Unlike blood, which becomes part of the animal's circulation and identity, milk in the stomach is merely a transient, collected substance, akin to something temporarily held in a container. Therefore:

• "כשרה שינקה מן הטרפה קיבתה אסורה": A kosher animal suckling from a tereifa mother will have tereifa milk in its stomach. Since the milk retains its source's status, and the source is tereifa, the milk itself is assur. The kosher animal's kashrut doesn't "kosher" the milk. This is an issur achila of tereifa milk, not basar bechalav. The kibah (stomach) itself is permitted, but its contents (the milk) are forbidden. The Mishnah highlights this to teach that one must remove or ensure the absence of this tereifa milk before consuming the stomach or its contents.
• "וטרפה שינקה מן הכשרה קיבתה מותרת": A tereifa animal suckling from a kosher mother will have kosher milk in its stomach. Here, the tereifa host animal's issur does not transfer to the milk, precisely because the milk is "כנוס במעיה" and not integrated into the tereifa's body. Therefore, the milk retains its original kosher status and is permitted. The chidush is to prevent one from mistakenly thinking that any substance found within a tereifa becomes forbidden by association.

The phrase "מפני שהוא כנוס במעיה" thus applies to both clauses, serving as the foundational reason for why the milk's kashrut is determined by its source and not its host. It's not self-evident because, without this explicit declaration, one might have analogized milk to blood or other bodily fluids that do adopt the host's status. This principle is crucial in numerous halachic areas where ingested or contained substances must be evaluated independently of their temporary host.

Terutz 2: Evolution of the Halacha – The "Chazara" of the "Chazara" (Mishnat Eretz Yisrael/Bavli Chullin)

Safrai, in Mishnat Eretz Yisrael, points out a further layer of halachic development that impacts the understanding of this clause, especially "כשרה שינקה מן הטרפה קיבתה אסורה." He notes that the Yerushalmi refers to this as "משנה ראשונה" (an earlier Mishnah), and the Bavli (Chullin 116b) suggests a later leniency:

"והלכתא: אין מעמידין בעור קבת נבלה, אבל מעמידין בקבת נבלה, ובקבת שחיטת נכרי, (ובקבת כשרה שינקה מן הטרפה, וכל שכן בקבת טרפה שינקה מן הכשרה, מאי טעמא – חלב המכונס בה, פירשא בעלמא הוא)" (Talmud Bavli, Chullin 116b)

This Bavli passage, often considered a "chazara" (reversal) of the chazara of R' Yehoshua, explicitly permits even "קבת כשרה שינקה מן הטרפה" (the rennet/stomach of a kosher animal that suckled from a tereifa). The reasoning given is "מאי טעמא – חלב המכונס בה, פירשא בעלמא הוא" (What is the reason? The milk collected in it is pirsha be'alma).

This represents a significant kula (leniency) compared to our Mishnah. The initial Mishnah's stringency on "כשרה שינקה מן הטרפה קיבתה אסורה" might have stemmed from an earlier, more rigorous view, perhaps linked to the high standards for korbanot (sacrifices), as suggested by R' Chanina ben Antigonus (cited in Tosefta Temurah 4:10). In this earlier context, even a slight connection to tereifa might have rendered something unfit. However, for everyday chullin (non-sacred food), the halacha evolved. The later psak in the Bavli re-emphasizes the pirsha be'alma aspect of the milk in the stomach, effectively saying that even tereifa milk, once contained in the stomach, is so far removed from "food" that it is considered mere excretion and does not prohibit the stomach itself or any cheese made with its rennet (unless there is a noten ta'am issue from actual meat).

Thus, the kushya regarding the initial Mishnah's stringency on "כשרה שינקה מן הטרפה" is resolved by understanding it as an earlier stratum of halacha, possibly influenced by broader ritual purity concerns or a less developed understanding of pirsha be'alma in this specific context. The later halacha (the "chazara" of the "chazara") reverts to a more lenient interpretation, grounding it firmly in the principle that contained milk is pirsha be'alma and therefore benign unless it directly imparts prohibited flavor.

Intertext

1. Mishnah Avodah Zarah 2:5 and Gemara 35a-b: The Foundational Gezeirah

The immediate and most direct intertextual parallel is Mishnah Avodah Zarah 2:5, which states: "ואלו דברים של עובדי כוכבים אסורין ואין איסורן איסור הנאה... גבינותיהן." (And these things of gentiles are forbidden, but their prohibition is not a prohibition of benefit... their cheeses.) The Gemara in Avodah Zarah 35a-b then delves into the reasons for this prohibition, engaging in a crucial dialogue between R' Yishmael and R' Yehoshua. This sugya is the heart of gevinat akum.

The Gemara explicitly discusses whether the prohibition stems from kibat neveila (rennet from a carcass) or kibat egley avodah zarah (rennet from calves used for idolatry). The resolution hinges on the concept of "קודם חזרה" (before R' Yehoshua's retraction) and "לאחר חזרה" (after his retraction). Initially, R' Yehoshua was lenient, suggesting kibah was pirsha be'alma. Later, he became stringent, establishing the gezeirah. R' Yishmael's persistent questioning and R' Yehoshua's evasive replies ("השיאו לדבר אחר" – he diverted him to another matter) are interpreted by some, like Prof. Safrai, as evidence that the gezeirah had a broader, non-technical rationale, such as preventing social assimilation or maintaining standards related to the Temple. This entire discussion is indispensable for understanding our Mishnah in Chullin, as the "קיבת עובד כוכבים ושל נבלה הרי זו אסורה" clause is a direct consequence of the gezeirah on gevinat akum and the Gemara's analysis of its reasons. The sugya in Avodah Zarah clarifies that the issur of kibat neveila is not necessarily because it is "meat" but because it originates from a forbidden source (a neveila is assur be'hana'ah), and the Sages decreed against its use in cheesemaking.

2. Sefer Devarim 14:21: The Scope of Basar Bechalav

The foundational prohibition of basar bechalav is derived from the thrice-repeated verse in Devarim 14:21: "לא תבשל גדי בחלב אמו" (You shall not cook a kid in its mother's milk). Our Mishnah (Chullin 8:6) itself immediately follows the discussion of kibah with a debate between R' Akiva and R' Yosei HaGelili regarding the scope of this Torah prohibition:

"רבי עקיבא אומר חיה ועוף אינם מן התורה, שנאמר 'גדי' שלש פעמים, פרט לחיה לעוף ולבהמה טמאה. רבי יוסי הגלילי אומר נאמר 'לא תאכלו כל נבלה' ונאמר 'לא תבשל גדי בחלב אמו', מה נבלה שאתה חייב עליה משום נבלה אף גדי שאתה חייב עליו משום נבלה. יצא עוף שאי אתה חייב עליו משום נבלה. תלמוד לומר 'בחלב אמו' יצא עוף שאין לו חלב אם." (Mishnah Chullin 8:6)

This debate on the inclusion of chaya (undomesticated animals) and of (birds) in the Torah prohibition of basar bechalav is highly relevant. The entire kibah sugya implicitly grapples with the definition of "meat" for basar bechalav. If kibah is pirsha be'alma, it's not "meat" at all, thus sidestepping basar bechalav concerns. However, if a kosher kibah "יש בה בנותן טעם" (imparts flavor), it is forbidden, indicating a basar bechalav issue. This tension between pirsha be'alma and noten ta'am of basar is central. The Gemara (Chullin 116a) delves deeply into R' Akiva and R' Yosei HaGelili's derivations, ultimately concluding that chaya and of are rabbinically prohibited for basar bechalav, but not by Torah law. This foundational sugya informs how we categorize the various substances (rennet, milk, meat from different animals) involved in cheesemaking and their respective prohibitions.

3. Tosefta Chullin 8:12-13: The Dynamic Nature of Gezeirot

The Tosefta Chullin 8:12-13 offers crucial textual evidence for the dynamic evolution of the halacha regarding kibat neveila and gevinat akum. It explicitly states:

"קיבה של נכרי ושל נבלה הרי זו אסורה, חזרו לומר מעמידין בקיבת נכרי ובקיבת נבלה ואין חוששין." (Tosefta Chullin 8:12)

This Tosefta directly testifies to a "חזרו לומר" (they returned to say) – a reversal of an earlier decree. This means that after the initial gezeirah (prohibiting the use of kibat neveila), the Sages later permitted it. This is profound. It suggests that the gezeirah of R' Yehoshua, which led to the prohibition of gevinat akum, was itself subject to reconsideration and eventual annulment.

This Tosefta directly challenges the notion of gezeirot as immutable. It implies that rabbinic decrees can be re-evaluated and even lifted, perhaps when the original reasons for the decree no longer apply, or when a different halachic perspective gains dominance. This "chazara" of the "chazara" provides strong support for Safrai's sociological interpretation, suggesting that when the social or ritual motivations subsided, the purely legalistic definition of kibah as pirsha be'alma reasserted itself, leading to a leniency. While this Tosefta's leniency is not the currently accepted psak for gevinat akum, it is a vital historical document for understanding the fluidity and deliberative process within halachic development.

4. Hilchot Piggul, Notar, Tum'ah (Mishnah Chullin 8:6): Categorization of Issurim

Immediately following the kibah discussion, Mishnah Chullin 8:6 shifts to a comparison of chelev (forbidden fat) and dam (blood), listing stringent elements of each:

"חומר בדם מבחלב וחומר בחלב מדם. חומר בחלב שיש בו מעילה, וחייבין עליו משום פיגול ונותר וטמא; ואין כן בדם. וחומר בדם שהוא נוהג בחיה ובעוף בכשרים ובטמאים, ואין כן בחלב שאינו נוהג אלא בבהמה טהורה." (Mishnah Chullin 8:6)

While seemingly a digression, this section offers a meta-halachic framework for categorizing and understanding the severity and scope of various prohibitions. Chelev is more stringent in its application to Temple offerings (involving me'ilah, piggul, notar, tum'ah), indicating its sanctity and the severity of its issur hana'ah. Dam is more expansive in its application across all animal types.

This comparison is relevant to our sugya on kibah because kibat neveila is also connected to an issur hana'ah (since neveila is assur be'hana'ah). The discussion of chelev as issur hana'ah and its unique stringencies provides a conceptual backdrop for understanding why the Sages might have decreed against kibat neveila even if it was pirsha be'alma. An issur hana'ah carries a different weight than a mere issur achila and is often not subject to bitul in the same way. Thus, this section, though discussing different issurim, illuminates the halachic methodology of categorizing and applying various prohibitions, which is central to the analysis of kibat neveila.

5. Responsa on Modern Rennet and "Achshavei"

Contemporary poskim (halachic authorities) grapple with the sugya of gevinat akum in the context of modern cheesemaking, where rennet sources have diversified. This involves applying the principles established in our Mishnah and its Gemara to new realities.

• Microbial/Vegetable Rennet: Modern poskim generally permit cheese made with microbial or vegetable rennet, as these do not originate from animals and therefore pose no basar bechalav, neveila, or avodah zarah concerns. This demonstrates adherence to the core halachic distinctions.
• Purified Animal Rennet: The more complex issue arises with animal rennet, which, even if derived from a neveila, undergoes extensive purification and chemical processing. Some poskim, notably Rav Moshe Feinstein (Igrot Moshe Y.D. 2:24), offered leniencies for certain hard cheeses (gevinah kashah) made with non-kosher animal rennet. His reasoning often involved the concept of achshavei (it has become a new entity), where the extensive processing and purification render the rennet so fundamentally altered that it loses its original halachic identity as neveila. Furthermore, he argued that in hard cheeses, the rennet is nitpal (secondary) and batel (nullified) in the vast quantity of milk, and its primary function is enzymatic, not as a food item. This position, while not universally accepted, reflects a sophisticated engagement with the pirsha be'alma concept: if the kibah is so processed that it is no longer recognizable as its original forbidden source, does the gezeirah still apply? This modern psak demonstrates the enduring relevance of the sugya's core questions regarding the definition of issur, pirsha be'alma, and the limits of rabbinic decrees in the face of changing technology.

Psak/Practice

The sugya of kibat neveila and its relationship to gevinat akum has a profound and enduring impact on practical halacha. The ultimate psak largely follows the "לאחר חזרה" (after the retraction) position, which maintains the stringency.

The Prohibition of Gevinat Akum

The accepted halacha is that gevinat akum (gentile cheese) is prohibited. This is codified in the Shulchan Aruch, Yoreh De'ah 115:1:

"גבינות העובדי כוכבים אסורות, מפני שמעמידין אותן בקיבת נבלה." (Shulchan Aruch, Yoreh De'ah 115:1)

This ruling explicitly adopts the reason of kibat neveila as the basis for the prohibition, aligning with the "לאחר חזרה" stage of R' Yehoshua's gezeirah. The prohibition is rabbinic in nature.

Key Distinctions in Practice:

• Source of Rennet: The crucial factor in modern kashrut certification for cheese is the source of the rennet.
  • Animal Rennet: If rennet is derived from an animal, it must come from a kosher animal that was ritually slaughtered (shechita). Even then, there is a discussion regarding the basar bechalav concern if the rennet still carries a "meat" taste or essence. However, if sufficiently purified and considered pirsha be'alma or batel be'shishim (nullified in 60 parts), it can be permitted. If it comes from a neveila or tereifa, it is forbidden due to the gezeirah.
  • Microbial or Vegetable Rennet: Rennet from these sources is generally permitted, as it contains no animal components and thus avoids the halachic issues associated with animal rennet. Most kosher cheese today uses non-animal rennet.
• Hard vs. Soft Cheese: Some poskim have considered leniencies for hard cheeses, where the rennet is considered to undergo significant chemical transformation and becomes nitpal (secondary) and batel (nullified) in the production process, and the issur may be considered achshavei (a new entity). Rav Moshe Feinstein's aforementioned psak in Igrot Moshe is a prominent example of this approach. However, this is a complex and highly debated psak, and many hechsherim (kosher certification agencies) do not rely on it for general certification.
• Jew's Supervision: The Shulchan Aruch clarifies that if a Jew oversees the entire cheesemaking process, even if gentiles are involved in the physical labor, the cheese can be permitted (Yoreh De'ah 115:2). This is a general rule for bishul akum (food cooked by a gentile) and gevinat akum, ensuring that no forbidden ingredients are introduced.

Status of Milk in an Animal's Stomach

The Mishnah's discussion of "כשרה שינקה מן הטרפה" and "טרפה שינקה מן הכשרה" directly informs the halacha regarding milk contained within an animal's stomach:

• Milk from a Kosher Animal: Even if found in the stomach of a tereifa animal, the milk is permitted, as it is "כנוס במעיה" and retains its source's kashrut.
• Milk from a Non-Kosher Animal: Conversely, milk from a non-kosher animal (e.g., a tereifa mother), even if found in a kosher animal's stomach, is forbidden. This is not a basar bechalav issue, but an issur tereifa (or issur min) of the milk itself.

This principle is crucial for understanding that milk, unlike blood, is not considered part of the animal's flesh once ingested, but rather a distinct, contained substance whose kashrut is determined by its origin.

Meta-Psak Heuristics

• Power of Gezeirot: The sugya highlights the immense power of rabbinic decrees (gezeirot) to override even technically permissible actions (e.g., kibah being pirsha be'alma). Once a gezeirah is established by a significant authority (like R' Yehoshua), it becomes binding even if the original technical assessment was lenient.
• Safeguards (Siyag): The prohibition of gevinat akum serves as a classic example of a siyag le'Torah (fence around the Torah), designed to prevent violations of more severe prohibitions (issurei d'Oraita). Even if the precise concern (e.g., kibat neveila) can be theoretically batel, the gezeirah aims to remove doubt and prevent accidental transgression.
• Dynamic Halacha: The historical discussion of "קודם חזרה" and "לאחר חזרה," and the Tosefta's "חזרו לומר," demonstrate that halacha is not static. Rabbinic decrees can evolve, be re-evaluated, or even be annulled under specific circumstances, though this is a rare and highly regulated process. The fact that the ultimate psak chose the stricter "לאחר חזרא" path for gevinat akum underscores the enduring weight given to rabbinic safeguards.

Takeaway

The sugya of kibah vividly illustrates the dynamic interplay between technical halachic definitions, the authoritative force of rabbinic decrees, and the broader historical-sociological context in shaping Jewish law. The enduring gezeirah of gevinat akum, despite a historical Tosefta of leniency, underscores the powerful role of rabbinic authority and the importance of maintaining safeguards against even tangential prohibitions.