The Sin of Nadab and Abihu
10 1 Aaron's sons Nadab and Abihu took their censers, put fire in them and added incense; and they offered unauthorized fire before the Lord, contrary to his command. 2 So fire came out from the presence of the Lord and consumed them, and they died before the Lord.
3 Moses then said to Aaron, "This is what the Lord spoke of when he said: " 'Among those who approach me I will be proved holy; in the sight of all the people I will be honored.' " Aaron remained silent.