Numbers 16:5, 8-10

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 cause him to come near to Him. That one whom He chooses He will cause to come near to Him.

Then Moses said to Korah, “Hear now, you sons of Levi: Is it a small thing to you that the God of Israel has separated you from the congregation of Israel, to bring you near to Himself, to do the work of the tabernacle of the LORD, and to stand before the congregation to serve them; and that He has brought you near to Himself, you and all your brethren, the sons of Levi, with you? And are you seeking the priesthood also?