Leviticus 10:10-12

10so that you can distinguish between the holy and the common, between the unclean and the clean,

11and so you can teach the Israelites all the decrees the Lord has given them through Moses.”

12Moses said to Aaron and his remaining sons, Eleazar and Ithamar, “Take the grain offering left over from the food offerings prepared without yeast and presented to the Lord and eat it beside the altar, for it is most holy.