Avodah Zarah5: 1
הַשּׂוֹכֵר אֶת הַפּוֹעֵל לַעֲשׂוֹת עִמּוֹ בְיֵין נֶסֶךְ — שְׂכָרוֹ אָסוּר. שְׂכָרוֹ לַעֲשׂוֹת עִמּוֹ מְלָאכָה אַחֶרֶת, אַף עַל פִּי שֶׁאָמַר לוֹ הַעֲבֵר לִי חָבִית שֶׁל יֵין נֶסֶךְ מִמָּקוֹם לְמָקוֹם — שְׂכָרוֹ מֻתָּר. הַשׂוֹכֵר אֶת הַחֲמוֹר לְהָבִיא עָלֶיהָ יֵין נֶסֶךְ — שְׂכָרָהּ אָסוּר. שְׂכָרָהּ לֵישֵׁב עָלֶיהָ, אַף עַל פִּי שֶׁהִנִּיחַ הָעוֹבֵד כּוֹכָבִים לְגִינוֹ עָלֶיהָ — שְׂכָרָהּ מֻתָּר.
[If] one hires a worker to assist him with nesech-wine, his wage is prohibited. [But if] he hired him to assist him with different work, even though he said to him, “Move a barrel of nesech-wine for me from place to place” —- his wage is permitted. [If] one hired a donkey to transport nesech-wine on it, its rental fee is prohibited; [if] he hired it to sit upon, even though the idolater placed his flagon upon it, its rental fee is permitted.