Numbers 16:6-10

6You, Korah, and all your followers are to do as follows: Take censers, 7and tomorrow you are to place fire and incense in them in the presence of the LORD. Then the man the LORD chooses will be the one who is holy. It is you sons of Levi who have taken too much upon yourselves!”

8Moses also said to Korah, “Now listen, you sons of Levi! 9Is it not enough for you that the God of Israel has separated you from the congregation of Israel and brought you near to Himself to perform the work at the LORD’s tabernacle, and to stand before the congregation to minister to them? 10He has brought you near, you and all your fellow Levites, but you are seeking the priesthood as well.