Numbers 16:5, 7, 10, 35, 40, 46-48

and he spoke to Korah and all his company, saying, “Tomorrow morning the LORD will show who is His, and who is holy, and will bring him near to Himself; even the one whom He will choose, He will bring near to Himself.

and put fire in them, and lay incense upon them in the presence of the LORD tomorrow; and the man whom the LORD chooses shall be the one who is holy. You have gone far enough, you sons of Levi!”

and that He has brought you near, Korah, and all your brothers, sons of Levi, with you? And are you seeking for the priesthood also?

Fire also came forth from the LORD and consumed the two hundred and fifty men who were offering the incense.

as a reminder to the sons of Israel that no layman who is not of the descendants of Aaron should come near to burn incense before the LORD; so that he will not become like Korah and his company—just as the LORD had spoken to him through Moses.

Moses said to Aaron, “Take your censer and put in it fire from the altar, and lay incense on it; then bring it quickly to the congregation and make atonement for them, for wrath has gone forth from the LORD, the plague has begun!” Then Aaron took it as Moses had spoken, and ran into the midst of the assembly, for behold, the plague had begun among the people. So he put on the incense and made atonement for the people. He took his stand between the dead and the living, so that the plague was checked.