“Summon your brother Aaron and his sons, Nadab, Abihu, Eleazar, and Ithamar. Separate them from the people of Israel, so that they may serve me as priests.
Aaron's sons, Nadab and Abihu, each took his fire pan, put live coals in it, added incense, and presented it to the Lord. But this fire was not holy, because the Lord had not commanded them to present it.
Moses said to Aaron and his two remaining sons, Eleazar and Ithamar, “Take the grain offering that is left over from the food offered to the Lord, make unleavened bread with it and eat it beside the altar, because this offering is very holy.