Exodus 29:32-34

And Aaron and his sons shall eat the flesh of the ram, and the bread that is in the basket, at the door of the tent of meeting.

And they shall eat those things wherewith atonement was made, to consecrate and to sanctify them: but a stranger shall not eat thereof, because they are holy.

And if aught of the flesh of the consecration, or of the bread, remain unto the morning, then thou shalt burn the remainder with fire: it shall not be eaten, because it is holy.