Avodah Zarah 62A

מתני׳ השוכר את הפועל לעשות עמו ביין נסך ⁠— שכרו אסור. שכרו לעשות עמו מלאכה אחרת, אף על פי שאמר לו ״העבר לי חבית של יין נסך ממקום למקום״⁠ — שכרו מותר. השוכר את החמור להביא עליה יין נסך ⁠— שכרה אסור. שכרה לישב עליה, אף על פי שהניח גוי לגינו עליה ⁠— שכרה מותר.

Mishnah: In the case of a non-Jew who hires a Jewish laborer to work with wine used for an idolatrous libation with him, his wage is forbidden, i.e., it is prohibited for the Jew to derive benefit from his wage. If the non-Jew hired him to do other work with him, even if he said to him while he was working with him: Transport the jug of wine used for a libation for me from this place to that place, his wage is permitted, i.e., the Jew is permitted to derive benefit from the money. With regard to a non-Jew who rents a Jew’s donkey to carry wine used for a libation on it, its rental fee is forbidden. If he rented it to sit on it, even if a non-Jew placed his jug of wine used for a libation on it, its rental fee is permitted.

גמ׳ מאי טעמא שכרו אסור? אילימא, הואיל ויין נסך אסור בהנאה, שכרו נמי אסור ⁠— הרי ערלה וכלאי הכרם דאסורין בהנאה, ותנן: מכרן וקידש בדמיהן ⁠— מקודשת!

Talmud: In the first case of the Mishnah, where a non-Jew hires a Jew to produce wine used for a libation with him, what is the reason that his wage is forbidden? If we say that since it is prohibited to derive benefit from wine used for a libation, his wage is also prohibited, that is difficult: There are the cases of orla produce, i.e., produce grown during a tree’s first 3 years, and diverse kinds planted in a vineyard, from which it is also prohibited to derive benefit, and yet we learned in a Mishnah (Kiddushin 56b) that if a man sold this produce and betrothed a woman with the money received for it, she is betrothed. Evidently, money gained from a forbidden item is not itself forbidden, as otherwise the betrothal would not take effect.