1 Corinthians 9:9-10

For it is written in the Law of Moses, “YOU SHALL NOT MUZZLE AN OX WHILE IT IS TREADING OUT THE GRAIN [to keep it from eating the grain].” Is it [only] for oxen that God cares? [Deut 25:4] Or does He speak entirely for our sake? Yes, it was written for our sake: The plowman ought to plow in hope, and the thresher to thresh in hope of sharing the harvest.