לֹא־תַחְסֹ֥ם שׁ֖וֹר בְּדִישֽׁוֹ׃ (ס)
Thou shalt not muzzle the ox when he treadeth out the corn.
Targum Jonathan on Deuteronomy
You shall not muzzle the mouth of the ox in the time of his treading out; nor the wife of the (deceased) brother, who would be mated with one smitten with an ulcer, and who is poorly related, shalt thou tie up with him.
Targum Jerusalem
Sons of Israel, My people, you shall not muzzle the ox in the hour of his treading.