Aaron’s sons Nadab and Abihu each took his own firepan, put fire in it, placed incense on it, and presented unauthorized fire before the Lord, which He had not commanded them to do.
Moses spoke to Aaron and his remaining sons, Eleazar and Ithamar: “Take the grain offering that is left over from the fire offerings to the Lord, and eat it prepared without yeast beside the altar, because it is especially holy.