Exodus 29:31-34

31You are to take the ram of ordination and boil its flesh in a holy place. 32At the entrance to the Tent of Meeting, Aaron and his sons are to eat the meat of the ram and the bread that is in the basket. 33They must eat those things by which atonement was made for their ordination and consecration. But no outsider may eat them, because these things are sacred. 34And if any of the meat of ordination or any bread is left until the morning, you are to burn up the remainder. It must not be eaten, because it is sacred.