Leviticus 10:10-12

10You must distinguish between the holy and the common, and the clean and the unclean,

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

12Moses spoke to Aaron and his remaining sons, Eleazar and Ithamar: “Take the grain offering that is left over from the food offerings to the Lord, and eat it prepared without yeast beside the altar, because it is especially holy.