Numbers 16:5-7

5And he spake unto Korah and unto all his company, saying, Even to morrow Yhwh 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.

6This do; Take you censers, Korah, and all his company;

7And put fire therein, and put incense in them before Yhwh to morrow: and it shall be that the man whom Yhwh doth choose, he shall be holy: ye take too much upon you, ye sons of Levi.