Numbers 18:8-10

8And Jehovah spoke to Aaron, And I, behold, I have given thee the charge of my heave-offerings, of all the hallowed things of the children of Israel; to thee have I given them, because of the anointing, and to thy sons by an everlasting statute.

9This shall be thine of the most holy things, [reserved] from the fire: every offering of theirs, of all their oblations, and of all their sin-offerings, and of all their trespass-offerings, which they render unto me, it is most holy for thee and for thy sons.

10As most holy shalt thou eat it: every male shall eat it; it shall be holy unto thee.