Leviticus 22:1-3

Then the Lord spoke to Moses, saying,

“Tell Aaron and his sons to be careful with the holy gifts of the sons of Israel, which they dedicate to Me, so as not to profane My holy name; I am the Lord.

Say to them, ‘Any man among all your descendants throughout your generations who approaches the holy gifts which the sons of Israel consecrate to the Lord, while he has an uncleanness, that person shall be cut off from My presence; I am the Lord.