'Oxen' in the Bible

So he sent other servants after saying, "Tell those who have been invited, "Look! I've prepared my dinner. My oxen and fattened calves have been slaughtered. Everything is ready. Come to the wedding!"'

Another said, "I bought five pairs of oxen, and I'm on my way to try them out. Please excuse me.'

For in the Law of Moses it is written, "You must not muzzle an ox while it is treading out the grain." God is not only concerned about oxen, is he?