Leviticus 21:21-23

²¹No man of the offspring of Aaron whose body is damaged in any way may come near to give the fire offerings of the Lord: he is damaged, he may not come near to make the offerings.

²²He may take of the bread of God, the holy and the most holy;

²³But he may not go inside the veil or come near the altar, because he is damaged; and he may not make my holy places common; for I the Lord have made them holy.