Mishneh Torah, Foreign Worship and Customs of the Nations 8

Sugya Map

• Core Issue: Ein adam oser davar she-eino shelo (A person cannot prohibit an object that does not belong to them).
• The Problem: Does a Jew’s illicit act (e.g., slaughtering an animal for an idol) constitute a "deed" (ma'aseh) that forbids the object, even if they lack proprietary authority over it?
• Primary Sources: Avodah Zarah 47b, 52a–53a; Chulin 41a; Rambam, Hilchot Avodah Zarah 8:1–2.

Text Snapshot

"When a person slaughters a colleague’s animal for the sake of a false deity... it does not become forbidden, because a person cannot cause an article that does not belong to him to become forbidden." (MT, Avodah Zarah 8:1)

Note the Rambam’s categorical stance: Ein adam oser davar she-eino shelo. While the Gemara (Avodah Zarah 52a) entertains kushyot regarding whether a "deed" (ma'aseh) might override this lack of ownership, the Rambam resolves this via the agent's intent.

Readings

• Kessef Mishneh: Argues that the Rambam’s leniency—permitting the animal—is rooted in the fact that the actor’s intent is not to truly worship, but to "cause his colleague suffering" (le-tza'arei chaveiro).
• Or Sameach: Offers a profound lomdus: he distinguishes between a "deed" that creates a kinyan (acquisition) and one that merely creates an issur (prohibition). He posits that because the actor does not intend to acquire the animal but only to spite the owner, the act fails to achieve the status of a ma'aseh that would trigger the prohibition.

Friction

Kushya: If ma'aseh is the mechanism of prohibition, why should ownership matter? If I desecrate the sanctity of an object, the object is objectively "tainted," regardless of who holds the deed. Terutz: The issur of avodah zarah is not merely an external "stain" but a transformation of the status of the property. Just as one cannot render an object hekdesh (consecrated) without ownership, one cannot "sanctify" an object to avodah zarah unless one has the power to define the object's legal status.

Intertext

• SA Yoreh De'ah 145:8: Codifies the Rambam’s view, noting that if the owner warns the actor and the actor persists, the animal is forbidden. This implies that the lack of prohibition is predicated on the owner's non-consent.

Psak/Practice

The principle ein adam oser davar she-eino shelo functions as a vital meta-halachic safeguard. It prevents malicious actors from "weaponizing" halacha to render a neighbor's property assur through unauthorized acts. In practical terms, one is not held liable for the "idol-worshiping" acts of a third party performed on one's own property without permission.

Takeaway

An object’s status as avodah zarah is not merely the result of a physical act, but a reflection of proprietary intent. Without ownership, an act of "worship" is legally null.