1Two of Aaron's sons, Nadab and Abihu, took the pans in which they burned incense. They put some burning coals in them and put incense on top of the coals, but this fire was not acceptable to Yahweh because it was not the kind that he had commanded them to burn.
2So suddenly a fire from Yahweh appeared and burned them up DOU in the presence of Yahweh.
3Then Moses/I said to Aaron, “That is what Yahweh predicted. He said, ‘Those priests who come near to me, I will show them that they must ◄respect me/treat me as being holy►; in the presence of all the people I am the one who must be honored.’” But Aaron said nothing.
4Then Moses/I summoned Mishael and Elzaphan, who were the sons of Aaron's uncle Uzziel, and said to them, “Take the corpses of your cousins outside the camp, away from the front of the Sacred Tent.”
5So they carried the corpses, which still had their special gowns on, outside the camp, and buried them.
6Then Moses/I said to Aaron and his other two sons Eleazar and Ithamar, “ You are sad because Nadab and Abihu died, but you must act like you always do. Do not allow the hair on your heads to remain uncombed, and do not tear your clothes. But your relatives and all your fellow Israelis are allowed to mourn for those whom Yahweh destroyed by fire.
Leviticus 10
Leviticus 10:1-6