Leviticus 21:21-23

21No man among the descendants of Aaron the priest who has a [physical] defect and is disfigured or deformed is to approach [the altar] to present the offerings of the Lord by fire. He has a defect; he shall not approach [the altar] to present the food of his God.

22He may eat the food of his God, both of the most holy and of the holy things,

23but he shall not go within the veil or approach the altar [of incense], because he has a defect, so that he will not profane My sanctuaries; for I am the Lord who sanctifies them.’ ”