Leviticus 21:6, 8, 17, 21-22

They shall be holy to their God and not profane the name of their God. For they offer the LORD’s food offerings, the bread of their God; therefore they shall be holy.

You shall sanctify him, for he offers the bread of your God. He shall be holy to you, for I, the LORD, who sanctify you, am holy.

“Speak to Aaron, saying, None of your offspring throughout their generations who has a blemish may approach to offer the bread of his God.

No man of the offspring of Aaron the priest who has a blemish shall come near to offer the LORD’s food offerings; since he has a blemish, he shall not come near to offer the bread of his God. He may eat the bread of his God, both of the most holy and of the holy things