Mishneh Torah, Forbidden Foods 8-10

Sugya Map

• Primary Issue: The scope and mechanics of the prohibition of Gid HaNasheh (the sciatic nerve).
• Key Nafkaminot:
  • Does Gid HaNasheh apply to nevelot (carrion) and trefot (torn animals)?
  • The interaction of Issur Chal Al Issur (can one prohibition take effect on another?).
  • The distinction between Scriptural (De'oraita) and Rabbinic (Derabanan) components of the gid.
  • The status of Gid HaNasheh in Kodshim (sacrificial animals) vs. Chulin (non-sacrificial).
• Primary Sources: Chullin 92b–102a; Mishneh Torah, Hilchot Ma'achalot Assurot 8:1–16; Genesis 32:33.

Text Snapshot

Mishneh Torah, Forbidden Foods 8:1: "[The prohibition against partaking of] the gid hanesheh applies with regard to kosher domesticated animals and wild beasts, even nevelot and trefot."

• Leshon Nuance: The Rambam uses the term nevelot and trefot to denote the status of the animal’s basar (meat). The dikduk here is subtle: he asserts that despite the existence of a prior prohibition (the carcass or the torn animal), the Gid HaNasheh prohibition—a distinct, late-arriving issur—applies. This is a rejection of the standard Issur Chal Al Issur limitation under specific configurations of Issur Kollel.

Readings

1. Nachal Eitan: The "Late Arrival" Logic

The Nachal Eitan grapples with a fundamental difficulty: if an animal is already trefe, how can the Gid HaNasheh prohibition "take hold" (chal)? The general rule is ein issur chal al issur (one prohibition cannot be superimposed on another). He argues that the Gid HaNasheh is a unique category because it does not attach at the moment of birth/creation, but only when the animal is sufficiently developed ("when it is on the hip-socket"). Because the Gid prohibition arrives "late" (ba la-sof), it bypasses the standard Issur Chal Al Issur restriction. He further suggests that since Gid HaNasheh is a briya (a distinct entity/creature-like portion), it is not batel (nullified) and remains a fully active prohibition, even when the surrounding meat is already forbidden.

2. Sha'ar HaMelekh: The Kodshim Paradox

The Sha'ar HaMelekh addresses why the Rambam includes Kodshim in the prohibition. If an animal is designated for the Altar, does the Gid prohibition apply? He analyzes the debate between R’ Pappa and R’ Natan bar Yitzchak in Chullin 92b. By concluding that the Rambam holds the Gid forbidden for Hala'ah (burning on the Altar), he establishes that the Gid is inherently forbidden to Hadiot (commoners) even in Kodshim. This resolves the tension: because the Gid is restricted from the Altar, it constitutes an Issur Mosif (an additional, distinct prohibition), which allows the Gid prohibition to be superimposed upon the Kodshim prohibition.

Friction

The Kushya: The "Flavor" Dilemma

The strongest kushya arises from the intersection of two Rambam-isms:

1. Halachah 5: The Rambam holds that Gid HaNasheh has no noten ta'am (flavor/substance).
2. Halachah 6: The Rambam rules that one who eats Gid from a nevelah is liable for two sets of lashes.

If the Gid has no flavor, it is essentially a piece of "wood" (as the SA later puts it). How can it trigger a new prohibition of nevelah? If it has no substance, it shouldn't be part of the nevelah body-prohibition; if it is part of the body, it should have flavor.

The Terutz

The Maggid Mishneh suggests that the Rambam views the Gid as a briya—a distinct legal entity. Even if it lacks flavor in a culinary sense, it possesses a halachic identity. Therefore, when one eats the Gid of a nevelah, one is simultaneously violating the nevelah prohibition (because the Gid is part of the animal) and the Gid HaNasheh prohibition (because the Gid is a uniquely forbidden briya). The "flavor" debate in the Gemara serves to define the nature of the Gid, but the Issur Kollel (encompassing prohibition) remains effective because the Gid is a discrete, measurable, and forbidden legal object.

Intertext

• Genesis 32:33: "Therefore the children of Israel do not eat the sciatic nerve..." The Midrash (Bereishit Rabbah 78:6) connects this to the Malach's strike. The Rambam (Commentary to Mishnah, Chullin 7:6) insists that despite the Patriarchs observing this ex post facto, our modern observance is strictly Mi-Sinai.
• SA Yoreh De'ah 65: The Shulchan Aruch codifies the Rambam’s stringency, particularly regarding the need for an expert to "ferret out" the branches of the nerve. This mirrors the Talmudic Chullin 92b concern that the Gid is not merely one string, but a network, necessitating the total abandonment of hindquarters in many traditions.

Psak/Practice

The Psak follows the Rambam’s locus of strictness:

1. Professionalism: A butcher’s word is accepted only if they are of established piety. In the modern Diaspora, this necessitates the mashgiach model, as the Gid is considered a briya and cannot be nullified in sixty (batel b'shishim).
2. Meta-Psak: The Rambam’s insistence that the prohibition is Mi-Sinai and not based on the Patriarchal event is a critical heuristic: it removes the mitzvah from the realm of "historical reenactment" and places it firmly in the category of chukim (statutes without rationales). This reinforces why we do not seek "health" or "symbolic" justifications; we treat it as an absolute legal boundary.

Takeaway

Gid HaNasheh is not a dietary restriction based on taste or biology, but a halachic boundary—a briya—that marks the animal's flesh as off-limits to the Hadiot regardless of the animal's status. It serves as a permanent, physical reminder of the wrestling match between the physical body and the spiritual essence.