Exodus 29:31-34

31“You are to take the ram of ordination and boil its flesh in a holy place.

32Aaron and his sons are to eat the meat of the ram and the bread that is in the basket at the entrance to the tent of meeting.

33They must eat those things by which atonement was made at the time of their ordination and consecration. An unauthorized person must not eat them, for these things are holy.

34If any of the meat of ordination or any of the bread is left until morning, burn what is left over. It must not be eaten because it is holy.