Numbers 16:5, 8-10

and he spake unto Korah and unto all his company, saying, Even to morrow the LORD will shew who are his, and who is holy; and will cause him to come near unto him: even him whom he hath chosen will he cause to come near unto him.

And Moses said unto Korah, Hear, I pray you, 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 the LORD, and to stand before the congregation to minister unto them? And he hath brought thee near to him, and all thy brethren the sons of Levi with thee: and seek ye the priesthood also?