Exodus 29:32-34

Then at the entrance of the Meeting Tent, Aaron and his sons must eat the meat of the sheep and the bread that is in the basket. They should eat these offerings that were used to remove their sins and to make them holy when they were made priests. But no one else is to eat them, because they are holy things. If any of the meat from that sheep or any of the bread is left the next morning, it must be burned. It must not be eaten, because it is holy.