Numbers 16:5, 8-10

and he said to Korah and all his company, “In the morning the LORD will show who is his, and who is holy, and will bring him near to him. The one whom he chooses he will bring near to him.

And Moses said to Korah, “Hear now, you sons of Levi: is it too small a thing for you that the God of Israel has separated you from the congregation of Israel, to bring you near to himself, to do service in the tabernacle of the LORD and to stand before the congregation to minister to them, and that he has brought you near him, and all your brothers the sons of Levi with you? And would you seek the priesthood also?