Leviticus 10:8-12

The Lord then spoke to Aaron, saying,

“Do not drink wine or strong drink, neither you nor your sons with you, when you come into the tent of meeting, so that you do not die—it is a permanent statute throughout your generations—

and to make a distinction between the holy and the profane, and between the unclean and the clean,

and so as to teach the sons of Israel all the statutes which the Lord has spoken to them through Moses.”

Then Moses spoke to Aaron, and to his surviving sons, Eleazar and Ithamar, “Take the grain offering that is left over from the Lord’s offerings by fire and eat it as unleavened bread beside the altar, for it is most holy.