Chullin 138

Sugya Map: The Mechanics of Obligation

• Issue: The threshold of "ownership" ($tzon-cha$) for Reishit HaGez (First Shearing) when the act of shearing and the acquisition of the shiur (measure) are disjointed.
• Nafka Mina: Can one "outrun" a mitzvah by selling sheep piecemeal, or does the obligation attach to the wool once the shiur is met?
• Primary Sources: Deuteronomy 18:4, Chullin 138a, Tosefta Kelim Bava Metzia 6:2.

Text Snapshot

The Gemara queries the status of a shearer who sells each fleece immediately: "Rav Hisda says: He is obligated... Rabbi Natan bar Hoshaya says: He is exempt" Chullin 138a. The crux is the phrase "your flock" (tzon-cha). If ownership is severed before the five-fleece threshold is reached, does the obligation crystallize?

Readings

• Rashi (s.v. Gezaz u-makhar): Emphasizes that if the owner sells immediately, he lacks the requisite "flock" at the moment the obligation matures. The mitzvah is not merely on the act of shearing, but on the possession of the resulting harvest.
• Ramban (ad loc): Argues that the obligation is cheftza (object-oriented); once the shearer has processed five fleeces, the obligation is inextricably linked to that wool. The sale is an attempt to evade a debt already in potential.

Friction

Kushya: If the obligation is on the owner at the time of shearing, why does the Gemara entertain the possibility that he is exempt? Terutz: The term "your flock" implies a state of ongoing ownership. If the sheep are sold, the link between the "flock" and the "shearing" is broken. As Rava notes, a person cannot sell "priestly gifts" that do not yet exist, yet the buyer is not liable for gifts generated by the seller's labor. Thus, the obligation fails for lack of a responsible party who maintains "flock" status.

Intertext

The logic mirrors Mishnah Pe'ah 3:5 regarding tree stalks: Pe'ah is an obligation on the field. Just as one cannot fragment a field to evade Pe'ah, one cannot fragment a flock to evade Gez. The divergence in Chullin demonstrates the intensity of the tzon-cha requirement compared to land-based Pe'ah.

Psak/Practice

The halacha follows the principle that one cannot evade Matanot Kehuna through transactional artifice. If the seller retains even a fraction of the wool, the obligation remains with him (the "residual" rule). The meta-psak heuristic: Mitzvot attached to produce (chovat ha-guf vs. chovat ha-keren) are non-negotiable; they attach to the assets regardless of the owner’s attempt to liquidate the source.

Takeaway

The obligation to the poor and the priesthood is not a tax on the act of shearing, but an inherent claim the Torah places on the wealth of the flock. You cannot sell your way out of a communal debt.