'Muzzle' in the Bible

You must not muzzle your ox when it is treading grain.

For the music director, Jeduthun; a psalm of David. I decided, "I will watch what I say and make sure I do not sin with my tongue. I will put a muzzle over my mouth while in the presence of an evil man."

For it is written in the law of Moses, "Do not muzzle an ox while it is treading out the grain." God is not concerned here about oxen, is he?

For the scripture says, "Do not muzzle an ox while it is treading out the grain," and, "The worker deserves his pay."