1 Corinthians 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?
Note 3 at 1Co 9:9: This phrase is a quotation from De 25:4 and is quoted two times in the New Testament (this verse and 1Ti 5:18). Paul was describing the Hebrew cultural practice of threshing grain. For example, corn or some other grain would be laid flat on the floor, and an ox would be driven over the stalks, shaking the corn loose from its husks. It would then be separated from the chaff. It was prohibited by the Law of Moses to muzzle the ox's mouth during this process. The ox was free to eat from the stalks as it worked. Paul used this Old Testament illustration to point out the right of Christian ministers to reap carnal things as they have sown spiritual things.
Note 4 at 1Co 9:9: The point that Paul was making is that God is much more concerned about us than He is about the animals, and there are many scriptures that speak of His care for the animals (De 5:14; Ps 145:15-16, 147:8-9; Mt 6:26; and Lu 12:24).