Leviticus 10:1 in the King James Version
And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD, which he commanded them not.
Context
1 Nadab and Abihu, the sons of Aaron, each took his censer, and put fire in it, and laid incense on it, and offered strange fire before the LORD, which he had not commanded them.
2 Fire came out from before the LORD, and devoured them, and they died before the LORD.