Numbers 16:3-8 New King James Version (NKJV)

3. They gathered together against Moses and Aaron, and said to them, “You take too much upon yourselves, for all the congregation is holy, every one of them, and the Lord is among them. Why then do you exalt yourselves above the assembly of the Lord?”

4. So when Moses heard it, he fell on his face;

5. and he spoke to Korah and all his company, saying, “Tomorrow morning the Lord will show who is His and who is holy, and will cause him to come near to Him. That one whom He chooses He will cause to come near to Him.

6. Do this: Take censers, Korah and all your company;

7. put fire in them and put incense in them before the Lord tomorrow, and it shall be that the man whom the Lord chooses is the holy one. You take too much upon yourselves, you sons of Levi!”

8. Then Moses said to Korah, “Hear now, you sons of Levi:

Numbers 16