1Cor 9:9-11

9For it is written in the law of Moses, “You shall not muzzle an ox while it is treading out the grain.” Is it for oxen that God is concerned?10Or does he not speak entirely for our sake? It was indeed written for our sake, for whoever plows should plow in hope and whoever threshes should thresh in hope of a share in the crop.11If we have sown spiritual good among you, is it too much if we reap your material benefits?