Exodus 29:33-35

New Century Version

³³ 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. ³⁴ 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.

³⁵ “Do all these things that I commanded you to do to Aaron and his sons, and spend seven days appointing them.