Mishnah Chullin 9:5-6

Sugya Map

• Issue: The conditions under which a kulit (thigh bone), from various sources of tum'ah (ritual impurity), transmits tum'ah via maga (contact) and massa (carrying). Specifically, the distinction between "sealed" (s'tumim) and "perforated" (n'kuvin) bones, and the general principle of "את שבא לכלל מגע בא לכלל משא" ("That which comes to the category of contact comes to the category of carrying").
• Nafka Mina(s): Determines when an individual becomes tamei (impure) by touching or carrying a kulit, impacting their ability to enter the Beit Hamikdash or consume kodshim (sacred foods) or terumah (priestly tithes). Crucially, it highlights the varying halachic statuses of bones from a human corpse (met), sacrificial animals (mukdashim), an unslaughtered carcass (nevelah), and a creeping animal (sheretz).
• Primary Sources: Mishnah Chullin 9:6; Vayikra 11:39-40.

Text Snapshot

The relevant lines from Mishnah Chullin 9:6 state:

קולית המת וקולית המוקדשים בין סתומין ובין נקובים הנוגע בהן טמא. קולית הנבלה וקולית השרץ הנוגע בהן סתומין טהור. ניקבו כל שהוא מטמין במגע. מניין אף במשא? תלמוד לומר: "הנוגע והנושא" (ויקרא יא, לט-מ) – את שבא לכלל מגע בא לכלל משא, לא בא לכלל מגע לא בא לכלל משא.

The thigh bone of a human corpse, and the thigh bone of a sacrificial [animal that was rendered unfit as piggul or notar], whether these thigh bones were sealed or whether they were perforated, one who touches them is ritually impure. With regard to the thigh bone of an unslaughtered carcass and the thigh bone of a creeping animal, one who touches them when they are sealed remains ritually pure. If one of these thigh bones was perforated at all, it imparts impurity via contact. From where is it derived that even with regard to impurity transmitted via carrying there is a distinction between sealed and perforated thigh bones? It is derived from a verse, as the verse states: “One who touches the carcass thereof shall be impure until the evening; and one who carries the carcass thereof shall be impure until the evening” (Leviticus 11:39–40), indicating: That which enters the category of impurity via contact, enters the category of impurity via carrying; that which does not enter the category of impurity via contact, does not enter the category of impurity via carrying.

Dikduk/Leshon Nuance

The Mishnah's construction "בין סתומין ובין נקובים" for met and mukdashim contrasts sharply with "סתומין טהור. ניקבו כל שהוא מטמין במגע" for nevelah and sheretz. This binary presentation immediately signals a fundamental halachic distinction based on the source of the bone. The phrase "כל שהוא" ("any size [perforation]") emphasizes that even a minimal opening changes the halacha. The drasha "את שבא לכלל מגע בא לכלל משא..." appears as a universal principle, linking the two modes of impurity transmission.

Readings

The Mishnah presents a fascinating dichotomy regarding kulit impurity, sparking deep conceptual analysis among Rishonim and Acharonim.

Rambam: Defining Kulit and Delineating Tum'ah Sources

Rambam, in his commentary to the Mishnah, provides foundational definitions and clarifies the scope of the halacha. He explains that "קולית הוא כל עצם שיש בו מוח והוא סתום בשתי קצותיו" (Mishnah Chullin 9:5:1) – a kulit is any bone containing marrow, sealed at both ends. This definition is crucial, as the presence and accessibility of marrow are central to the tum'ah status. Regarding "מוקדשין," Rambam clarifies that this refers to "נותר מן המוקדשין" (Mishnah Chullin 9:5:1), i.e., leftover sacrificial portions, which, like piggul (sacrificial meat improperly intended), transmit impurity to hands. He notes the minyan af b'massa (derivation for carrying) applies specifically to kulit nevelah, while a sheretz (creeping animal) does not transmit tum'at massa at all, as elucidated in Masechet Keilim. Rambam's precision highlights that the general rule of maga correlating with massa is not universally applied to all sources of tum'ah.

Tosafot Yom Tov: The Nuance of Shomer (Protector)

Tosafot Yom Tov delves into the underlying rationale, particularly for the kulit nevelah and sheretz being pure when sealed. He explains that "נבלה אין עצמותיה מטמאים... וכן שרץ. דבשרץ נמי דריש בת"כ פרשת שמיני פ"י בנבלתם לא מן העצמות ולא מן השינים" (Mishnah Chullin 9:5:2). The Tosefta in Torat Kohanim (Vayikra 11:39-40) explicitly states that the impurity of a nevelah or sheretz comes from their "carcass" but not their bones or teeth, unless flesh is attached. The sealed bone, therefore, acts as a shomer (protector/barrier) to the marrow within. TYT then cites a pivotal Gemara (Eruvin 13b, though he refers generally to "גמ'") where R. Zeira challenges Abaye: "אלא מעתה בהמה בעורה לא תטמא?" ("If so, an animal with its hide wouldn't become impure?"). Abaye responds: "פוק חזי כמה נקבים יש בה [הפה והחוטם והעינים]" ("Go see how many holes it has! [mouth, nose, eyes]"). This exchange establishes that the shomer concept applies only where there is no direct access to the tum'ah. For a sealed kulit nevelah, the bone completely obstructs direct contact with the impure marrow, rendering it pure.

Rashash: Tum'ah Boka'at V'Olah and the Shomer

Rashash elaborates on the shomer concept, particularly in relation to tum'at ohel (impurity by overshadowing). He addresses a seeming contradiction: if direct contact is impossible, why would ohel work? He posits that in such cases, "אילו מאהיל על העצם שנגד המוח טמא משום טומאה בוקעת ועולה והוי כמגע" (Rashash on Mishnah Chullin 9:5:1). Meaning, if one overshadows the bone directly above the marrow, the tum'ah "breaks through and ascends" (tum'ah boka'at v'olah), effectively being considered maga. However, he notes this might align with Rava's view, differing from R. Zeira and Abaye. Rashash further distinguishes: for kulit nevelah to make the shomer impure by contact, the tum'ah itself must be capable of transmitting impurity by contact. But for ohel, it suffices if the tum'ah itself is capable of transmitting impurity by ohel. This subtle distinction refines our understanding of how a shomer interacts with different modes of tum'ah.

Tosafot Rabbi Akiva Eiger: The Kulit Met and the Comprehensive Shomer

Tosafot Rabbi Akiva Eiger (TRAE) builds on the shomer discussion, distinguishing kulit met from kulit nevelah. He explains that for "קולית המת אם יש בתוכו כזית המוח ומקצת העצם שלא כנגד המוח בבית מביא את הטומא' לבית מדין שומר" (TRAE on Mishnah Chullin 9:5:1). Even if the bone of a met is not directly against the marrow, if it contains a k'zayit of marrow, the entire bone transmits tum'ah into a house via shomer. While a typical hide acting as a shomer for meat requires contact against the meat, with a kulit, "כיון דאם ינקב ישפך המוח מקרי כולו שומר" (TRAE on Mishnah Chullin 9:5:1, citing Chullin 119a). Since perforating the bone would cause the marrow to spill, the entire bone is considered a shomer to the marrow, and thus the met's bone itself is inherently tamei even when sealed, unlike nevelah or sheretz. This highlights the inherent severity of tum'at met which transcends the protective quality of the bone in ways that tum'at nevelah does not.

Friction

Kushya: The Universal vs. The Particular in Tum'ah Transmission

The Mishnah presents the rule "את שבא לכלל מגע בא לכלל משא, לא בא לכלל מגע לא בא לכלל משא" ("That which comes to the category of contact comes to the category of carrying; that which does not come to the category of contact, does not come to the category of carrying") as a foundational principle derived from the verse "הנוגע והנושא" (Vayikra 11:39-40). This appears to be a sweeping generalization, establishing an intrinsic link between these two modes of tum'ah transmission.

However, the very context of our Mishnah, and particularly other sugyot in Seder Tahorot, severely challenges the universality of this principle. For instance, the Mishnah itself differentiates: kulit met and mukdashim are tamei by maga whether sealed or perforated, implying they would also be tamei by massa. But kulit nevelah and sheretz are tahor (pure) when sealed by maga, and thus by this rule, should be tahor by massa. Yet, the Rambam himself notes that sheretz has no tum'at massa at all, regardless of maga status for its bones, creating a specific exception.

More broadly, Mishnah Ohalot 2:4, explicitly cited by Mishnat Eretz Yisrael, discusses the golel v'dofek (the stone covering a grave and its supporting stone), which "מטמאין במגע ובאהל ואינן מטמאין במשא" ("impart impurity by contact and overshadowing, but not by carrying"). This is a direct contradiction to the general principle articulated in our Mishnah, as they clearly transmit tum'ah by maga but not by massa. The Tosefta Ohalot 3:7-8 further records extensive debates between R. Akiva, R. Eliezer, and R. Yehoshua regarding the relative severities of maga, massa, and ohel, demonstrating that the relationship between these modes of impurity is far from straightforward or universally agreed upon. How can a drasha from a pasuk yield a general rule that is so frequently contested or limited in its application?

Terutz: Local Rules and Conceptual Divergence

The Mishnat Eretz Yisrael offers a compelling terutz by positing that these are not universal, hierarchical rules but rather "כללים מקומיים" ("local rules") or specific arguments within broader debates, reflecting fundamentally different conceptual understandings (sekharot) of tum'ah. The statement "את שבא לכלל מגע בא לכלל משא..." is not an axiom of Halacha that applies across the board, but rather a chiddush (novel interpretation) or a specific drasha by a particular Tanna (in this case, identified as R. Akiva in the preceding Mishnah by MEI, though with a note on potential transmission errors).

This approach suggests that Chazal did not necessarily operate with a single, unified theory of tum'ah transmission where maga and massa were always linked. Instead, the Torah, through various verses and oral traditions, established distinct parameters for each type of tum'ah and mode of transmission. The drasha from Vayikra 11:39-40 is thus understood as defining a relationship for nevelah and sheretz in the context of their specific tum'ah, rather than as a universal meta-rule for all avot hatum'ah.

The disputes in Ohalot highlight that the Tannaim grappled with the logical coherence of these different categories. R. Akiva's statement in Chullin could be seen as an attempt to establish a logical consistency for specific cases, but other Tannaim found other logical frameworks or mesorot (traditions) that led to different conclusions for other tum'ot. The conclusion of Mishnat Eretz Yisrael is that "אין כאן מִדרג של חומרה אלא שוני, ולא היו כאן כללים ברורים ודירוג קבוע" (Mishnat Eretz Yisrael on Mishnah Chullin 9:5:3-7) – there is no single hierarchy of severity, but rather differences, and no clear, fixed rules or rankings. Each case is governed by its specific halachot, and the "general rules" are often localized or represent one Tanna's conceptualization.

Intertext

Tanakh: The Source of Maga and Massa

The foundational text for the discussion of maga and massa impurity is Vayikra 11:39-40:

וכי ימות מן הבהמה אשר היא לכם לאכלה, הנוגע בנבלתה יטמא עד הערב. והאכל מנבלתה יכבס בגדיו וטמא עד הערב, והנושא את נבלתה יכבס בגדיו וטמא עד הערב. And if any animal of which you may eat dies, he who touches its carcass shall be unclean until the evening. And he who eats of its carcass shall wash his clothes and be unclean until the evening; and he who carries its carcass shall wash his clothes and be unclean until the evening.

This passage explicitly distinguishes between "הנוגע" (one who touches) and "והנושא" (and one who carries) in the context of tum'at nevelah. The Mishnah's drasha "את שבא לכלל מגע בא לכלל משא..." directly builds upon this juxtaposition, interpreting it as a principle of equivalence for nevelah and sheretz (with the Rambam's noted distinction for sheretz not having tum'at massa). This pasuk provides the bedrock upon which the entire edifice of maga and massa impurity is constructed, with Chazal meticulously deriving the nuances for different avot hatum'ah.

Seder Tahorot: Golel v'Dofek and the Limits of the Rule

A powerful intertextual parallel, crucial for understanding the limits of the Mishnah's maga/massa rule, comes from Mishnah Ohalot 2:4:

הגולל והדופק מטמאין במגע ובאהל ואינן מטמאין במשא. רבי אליעזר אומר מטמאין במשא... The golel (rolling stone covering a grave) and the dofek (supporting stone) impart impurity by contact and overshadowing, but do not impart impurity by carrying. Rabbi Eliezer says: They do impart impurity by carrying...

This Mishnah presents a clear case where an entity (golel v'dofek) transmits tum'ah via maga and ohel (both considered severe forms of tum'at met), but not via massa, according to Tanna Kamma. This stands in direct tension with the general principle articulated in Chullin 9:6, "את שבא לכלל מגע בא לכלל משא." The dispute with Rabbi Eliezer underscores that the very relationship between maga and massa was a subject of profound debate among the Tannaim. Mishnat Eretz Yisrael (on Chullin 9:5:3-7) meticulously details this debate from Tosefta Ohalot 3:7-8, showing R. Akiva, R. Eliezer, and R. Yehoshua all presenting different logical arguments about which modes of tum'ah are more stringent or inclusive. This demonstrates that the Chullin principle is not a universally applicable meta-rule but a specific interpretive stance, perhaps limited to tum'at nevelah (and even there, with exceptions like sheretz bones).

Psak/Practice

The psak halacha generally follows the specific distinctions articulated in our Mishnah for each type of kulit. For example, Rambam codifies these laws in Hilchot Tum'at Met and Hilchot She'ar Avot HaTum'ot.

1. Kulit Met/Mukdashim: The thigh bone of a human corpse or notar from mukdashim (sacrificial offerings) imparts tum'ah by contact, whether sealed or perforated. This is because the tum'ah of met is severe and the bone itself is considered part of the met or its shomer in a comprehensive sense (as per TRAE). Rambam rules that even a bone of a met the size of a barley grain imparts tum'ah (Hilchot Tum'at Met 3:2).
2. Kulit Nevelah/Sheretz: The thigh bone of a nevelah or sheretz only imparts tum'ah by contact if it is perforated, allowing access to the marrow. If sealed, it is pure. This aligns with the understanding that the bone itself is not tamei in these cases, but rather the marrow within, and the sealed bone acts as an effective shomer (Hilchot She'ar Avot HaTum'ot 1:2; Hilchot Tum'at Met 1:19).
3. Maga vs. Massa: The principle "את שבא לכלל מגע בא לכלל משא" is applied contextually. For nevelah, if an item is tamei by maga, it is also tamei by massa. However, for a sheretz, while its flesh can make impure by maga, its bones do not make impure by massa at all (Rambam, Hilchot Tum'at Met 1:19), demonstrating that the rule is not absolute and is subject to specific drashot and mesorot. The case of golel v'dofek (Ohalot 2:4) further confirms that this rule is not a universal meta-halacha but applies to specific categories of tum'ah.

In essence, Halacha adopts the specific rulings of the Mishnah, recognizing that the general statement about maga and massa is not an overarching axiom but a principle applicable to its immediate context, with other tum'ot having their own distinct rules.

Takeaway

The intricate sugya of kulit impurity profoundly illustrates the nuanced and conditional nature of Halacha, where seemingly universal principles are often localized interpretations. It underscores the rigorous conceptual distinctions Chazal drew between various sources and modes of tum'ah.