Leviticus 21:21-23

²¹no man that hath a blemish, of the seed of Aaron the priest, shall come nigh to offer the offerings of the Lord made by fire: he hath a blemish; he shall not come nigh to offer the bread of his God.

²²He shall eat the bread of his God, both of the most holy, and of the holy.

²³Only he shall not go in unto the vail, nor come nigh unto the altar, because he hath a blemish; that he profane not my sanctuaries: for I the Lord do sanctify them.