Leviticus 10:1-3 Amplified Bible (AMP)
The Sin of Nadab and Abihu
10 Now Nadab and Abihu, the sons of Aaron, took their respective [ceremonial] censers, put fire in them, placed incense on it and offered [a]strange (unauthorized, unacceptable) fire before the Lord, [an act] which He had not commanded them to do. 2 And fire came out from the presence of the Lord and devoured them, and they died before the Lord. 3 Then Moses said to Aaron, “This is what the Lord said:
‘I will be treated as holy by those who approach Me,
So Aaron, therefore, said nothing.
Leviticus 10:1-3 New International Version (NIV)
The Death of Nadab and Abihu
10 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
Aaron remained silent.