Numbers 18:15

18:15 The firstborn of every womb which they present to the Lord, whether human or animal, will be yours. Nevertheless, the firstborn sons you must redeem, and the firstborn males of unclean animals you must redeem.

Numbers 22:30

22:30 The donkey said to Balaam, “Am not I your donkey that you have ridden ever since I was yours until this day? Have I ever attempted to treat you this way?” And he said, “No.”