Leviticus 21:21-23

21No man of the descendants of Aaron the priest, who has a defect, shall come near to offer the offerings made by fire to the Lord. He has a defect; he shall not come near to offer the bread of his God.

22He may eat the bread of his God, both the most holy and the holy;

23only he shall not go near the veil or approach the altar, because he has a defect, lest he profane My sanctuaries; for I the Lord sanctify them.’ ”