Leviticus 22:18-23

18Speak to Aaron, and to his sons, and to all the children of Israel, and say to them, Whoever 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 to the LORD for a burnt offering; 19Ye shall offer at your own will a male without blemish, of the cattle, of the sheep, or of the goats. 20But whatever hath a blemish, that shall ye not offer: for it shall not be acceptable for you. 21And whoever offereth a sacrifice of peace offerings to the LORD to accomplish his vow, or a freewill offering in cattle or sheep, it shall be perfect to be accepted; there shall be in it no blemish.1 22Blind, or broken, or maimed, or having a running sore, or eczema, or scabs, ye shall not offer these to the LORD, nor make an offering by fire of them upon the altar to the LORD. 23Either a bull or a lamb that hath any thing superfluous or lacking in his parts, that mayest thou offer for a freewill offering; but for a vow it shall not be accepted.2