Leviticus 22:18-23

18“Speak to Aaron and his sons and all the people of Israel and say to them, When any one of the house of Israel or of the sojourners in Israel presents a burnt offering as his offering, for any of their vows or freewill offerings that they offer to the LORD, 19if it is to be accepted for you it shall be a male without blemish, of the bulls or the sheep or the goats. 20You shall not offer anything that has a blemish, for it will not be acceptable for you. 21And when anyone offers a sacrifice of peace offerings to the LORD to fulfill a vow or as a freewill offering from the herd or from the flock, to be accepted it must be perfect; there shall be no blemish in it. 22Animals blind or disabled or mutilated or having a discharge or an itch or scabs you shall not offer to the LORD or give them to the LORD as a food offering on the altar. 23You may present a bull or a lamb that has a part too long or too short for a freewill offering, but for a vow offering it cannot be accepted.