For it is written in the law of Moses, You shall not muzzle the mouth of the ox that treads out the grain. Does God care for oxen?
All Commentaries on 1 Corinthians 9:9 Go To 1 Corinthians 9
The Apostolic Constitutions
AD 375
Now we say these things, not as if you might not partake of the fruits of your labours; for it is written, "Thou shalt not muzzle the mouth of the ox which treadeth out the corn; "