Numbers 16:5, 8-10

Then he said to Korah and all his followers: “In the morning the LORD will show who belongs to him and who is holy, and he will have that person come near him. The man he chooses he will cause to come near him.

Moses also said to Korah, “Now listen, you Levites! Isn’t it enough for you that the God of Israel has separated you from the rest of the Israelite community and brought you near himself to do the work at the LORD’s tabernacle and to stand before the community and minister to them? He has brought you and all your fellow Levites near himself, but now you are trying to get the priesthood too.