I Corinthians 9:8-10

Do I say these things as a mere man? Or does not the law say the same also? For it is written in the law of Moses, “You shall not muzzle an ox while it treads out the grain.” Is it oxen God is concerned about? Or does He say it altogether for our sakes? For our sakes, no doubt, this is written, that he who plows should plow in hope, and he who threshes in hope should be partaker of his hope.