Leviticus 22:2-3

2‘Israel's people give gifts to God. Those gifts are holy. Tell Aaron and his sons that those things are holy. Tell them that they must remember that. They must give honour to my name. I am the Lord.

3One of your sons may not be clean. That son must not come near the Lord's holy offerings. But perhaps he may not obey my rule. He might go near to the holy gifts. The priests who are clean must punish him. They must send him away. He must go from God's house. I am the Lord. This rule is for now and for all time.