Numbers 18:8-10 (KJV)
8 And the Lord spake unto Aaron, Behold, I also have given thee the charge of mine heave offerings of all the hallowed things of the children of Israel; unto thee have I given them by reason of the anointing, and to thy sons, by an ordinance for ever.
9 This shall be thine of the most holy things, reserved from the fire: every oblation of their’s, every meat offering of their’s, and every sin offering of their’s, and every trespass offering of their’s which they shall render unto me, shall be most holy for thee and for thy sons.
10 In the most holy place shalt thou eat it; every male shall eat it: it shall be holy unto thee.