Leviticus 10:1-2

Wycliffe Bible

10 And when Nadab and Abihu, the sons of Aaron, had taken censers, and putted fire (therein), and incense [there]above, and offered before the Lord alien fire, which thing was not commanded to them. (But then Nadab and Abihu, Aaron’s sons, took their censers, and put fire in them, and some incense on it, and offered unholy fire before the Lord, which they were not commanded to do.)

² And fire went out from the Lord, and devoured them, and they were dead before the Lord.