Numbers 16:40-44

as a reminder to the sons of Israel so that no layman, anyone who was not of the descendants of Aaron, would approach to burn incense before the Lord; then he would not become like Korah and his group—just as the Lord had spoken to him through Moses. Murmuring and Plague

But on the next day all the congregation of the sons of Israel grumbled against Moses and Aaron, saying, “You are the ones who have caused the death of the Lord’s people!”

It came about, however, when the congregation had assembled against Moses and Aaron, that they turned toward the tent of meeting, and behold, the cloud covered it and the glory of the Lord appeared.

Then Moses and Aaron came to the front of the tent of meeting,

and the Lord spoke to Moses, saying,