Leviticus 6:16-18

16And the remainder thereof shall Aaron and his sons eat: unleavened shall it be eaten in a holy place; in the court of the tent of meeting shall they eat it.

17It shall not be baken with leaven. As their portion have I given it [unto them] of my offerings by fire: it is most holy; as the sin-offering, and as the trespass-offering.

18All the males among the children of Aaron shall eat of it. [It is] an everlasting statute in your generations, [their portion] of Jehovah's offerings by fire: whatever toucheth these shall be holy.