And, behold, the cloud covered it. — The cloud had probably been removed on the preceding day when the rebels were consumed, and was now again restored in order to encourage Moses and Aaron.
Related Commentaries of Numbers 16:42
Numbers 16:42
42 And it came to pass, when the congregation was gathered against Moses and against Aaron, that they looked toward the tabernacle of the congregation: and, behold, the cloud covered it, and the glory of the LORD appeared.