Leviticus 10:10-12

10as well as to distinguish between the holy and the common, and between the unclean and the clean,

11and to teach the Israelites all the statutes that the Lord has spoken to them through Moses.”

12Then Moses spoke to Aaron and to Eleazar and Ithamar, his remaining sons, “Take the grain offering which remains from the gifts of the Lord and eat it unleavened beside the altar, for it is most holy.