Leviticus 22:2–3

2 “Tell Aaron and his sons to deal respectfully with the holy offerings of the Israelites that they have consecrated to me, so they do not profane my holy name;a I am the Lord. 3 Say to them: If any man from any of your descendants throughout your generations is in a state of uncleanness yet approaches the holy offerings that the Israelites consecrate to the Lord, that person will be cut off from my presence; I am the Lord.