For the source text click/tap here: Bava Metzia 90
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They sent to Shmuel’s father a halakhic inquiry with regard to these oxen which gentiles steal and castrate. Since it is prohibited for Jews to castrate animals, they would sometimes arrange for a gentile to pretend to steal the animal and subsequently return it after castrating it, as it is easier to handle a castrated animal.
What is the halakha with regard to a case of this kind? Shmuel’s father sent to him: They used artifice; therefore, you should use artifice with them and make them sell it as a punishment. This shows that it is prohibited to instruct a gentile to perform a prohibition on one’s behalf.
Rav Pappa said: This provides no conclusive proof, as the inhabitants of the West, i.e., Eretz Yisrael, who are the ones who raised this question, hold in accordance with the opinion of Rabbi Ḥideka, who says: The descendants of Noah are commanded with regard to castration. They too are prohibited from performing this practice.
We explore the Noachide laws and their application.