Leviticus 6:16-18

16And that which is left thereof shall Aaron and his sons eat: it shall be eaten without leaven in a holy place; in the court of the tent of meeting they shall eat it. 17It shall not be baken with leaven. I have given it as their portion of my offerings made by fire; it is most holy, as the sin-offering, and as the trespass-offering. 18Every male among the children of Aaron shall eat of it, as his portion for ever throughout your generations, from the offerings of Jehovah made by fire: whosoever toucheth them shall be holy.