הֲיִֽנְהַק־פֶּ֥רֶא עֲלֵי־דֶ֑שֶׁא אִ֥ם יִגְעֶה־שּׁ֝֗וֹר עַל־בְּלִילֽוֹ׃
שרײַט דען אַ װאַלדאײזל אױף גראָז?צי מרוקעט אַן אָקס אױף זײַן פֿוטער?
Rashi
Does a wild donkey bray That is to say, do I cry out for nothing? Even a stupid animal does not bray when it has food, neither does an ox low unless it does not have grain fodder. With a wild donkey, the expression used is נַהַק, braying, and with an ox, the expression of געיה, lowing.