Leviticus 21:21
No 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.
Leviticus 21:6
Let them be holy to their God and not make the name of their God common; for the fire offerings of the Lord and the bread of their God are offered by them, and they are to be holy.
Leviticus 21:8
And he is to be holy in your eyes, for by him the bread of your God is offered; he is to be holy in your eyes, for I the Lord, who make you holy, am holy.
Leviticus 21:17
Say to Aaron, If a man of your family, in any generation, is damaged in body, let him not come near to make the offering of the bread of his God.