Numbers 18:8-10

8Then the Lord spoke to Aaron, “Look, I have put you in charge of the contributions brought to me. As for all the holy offerings of the Israelites, I have given them to you and your sons as a portion and a permanent statute.

9A portion of the holiest offerings kept from the fire will be yours; every one of their offerings that they give me, whether the grain offering, sin offering, or guilt offering will be most holy for you and your sons.

10You are to eat it as a most holy offering. Every male may eat it; it is to be holy to you.