Leviticus 10:1-2

Leviticus 10:1-2 ESV

Now Nadab and Abihu, the sons of Aaron, each took his censer and put fire in it and laid incense on it and offered unauthorized fire before the LORD, which he had not commanded them. And fire came out from before the LORD and consumed them, and they died before the LORD.
ESV: English Standard Version 2016