(Mishnah): If an idolater hired a donkey (from a Jew) to bring Yayin Nesech, its payment is prohibited to the Jew. If the idolater hired it to sit on (meaning to put food and drink there), even if he put his jar of Yayin Nesech on it, its payment is permitted.

(Gemara) Question: How much food and drink is he putting on it that the Mishnah must teach that it is permitted to put his jar of Yayin Nesech on it?

Answer: Even if there is a small amount for which a donkey driver would not be particular.