Leviticus 10:1-3 New King James Version (NKJV)
The Profane Fire of Nadab and Abihu
10 Then Nadab and Abihu, the sons of Aaron, each took his censer and put fire in it, put incense on it, and offered profane fire before the Lord, which He had not commanded them. 2 So fire went out from the Lord and devoured them, and they died before the Lord. 3 And Moses said to Aaron, “This is what the Lord spoke, saying:
‘By those who come near Me
So Aaron held his peace.