Numbers 16:5, 8-10

and he spake unto Korah and unto all his company, saying, In the morning Jehovah will show who are his, and who is holy, and will cause him to come near unto him: even him whom he shall choose will he cause to come near unto him.

And Moses said unto Korah, Hear now, ye sons of Levi: seemeth it but a small thing unto you, that the God of Israel hath separated you from the congregation of Israel, to bring you near to himself, to do the service of the tabernacle of Jehovah, and to stand before the congregation to minister unto them; and that he hath brought thee near, and all thy brethren the sons of Levi with thee? and seek ye the priesthood also?