Numbers 16:6

3 They came together against Moses and against Aaron, and said to them, You take overmuch on yourselves, seeing that all the people are holy, every one of them, and the Lord is among them; why then have you put yourselves in authority over the people of the Lord?

4 And Moses, hearing this, went down on his face;

5 And he said to Korah and his band, In the morning the Lord will make clear who are his, and who is holy, and who may come near him: the man of his selection will be caused to come near him.

6 So do this: let Korah and all his band take vessels for burning perfumes;

7 And put spices on the fire in them before the Lord tomorrow; then the man marked out by the Lord will be holy: you take overmuch on yourselves, you sons of Levi.

8 And Moses said to Korah, Give ear now, you sons of Levi:

9 Does it seem only a small thing to you that the God of Israel has made you separate from the rest of Israel, letting you come near himself to do the work of the House of the Lord, and to take your place before the people to do what has to be done for them;