Numbers 18:8-10

8Then the Lord spoke to Aaron, “Now behold, I [the Lord] have entrusted you with My heave offerings, even all the holy gifts of the Israelites, I have given them to you as a portion, and to your sons as a continual allotment.

9This shall be yours of the most holy things, [reserved] from the fire: every offering of the people, every grain offering and sin offering and guilt offering, which they shall render (give) to Me, shall be most holy for you and for your sons.

10You shall eat it as the most holy thing; every male [of your family] shall eat it. It shall be holy to you.