Leviticus 22:18-21

EJ2000(i) 18 Speak unto Aaron and to his sons and unto all the sons of Israel and say unto them, Any man of the house of Israel or of the strangers in Israel that will offer his oblation for all his vows and for all his freewill offerings, which they will offer unto the LORD for a burnt offering, 19 ye shall offer of your own free will a male without blemish of the bovine cattle of the sheep or of the goats. 20 But ye shall not offer any thing that has a blemish, for it shall not be acceptable for you. 21 Likewise when anyone offers a sacrifice of peace unto the LORD to present his vow or a freewill offering in bovine cattle or sheep, it must be perfect to be accepted; there shall be no blemish therein.