Thou shalt not muzzle the mouth of the ox— See on Deuteronomy 25:4 and Raphelius on the place.
Related Commentaries of 1 Corinthians 9:9
1 Corinthians 9:9
9 For it is written in the law of Moses, Thou shalt not muzzle the mouth of the ox that treadeth out the corn. Doth God take care for oxen?