Numbers 9:16-20

That is how it was continuously; the cloud would cover it by day, and the appearance of fire by night.

Whenever the cloud was lifted from over the tent, afterward the sons of Israel would set out; and in the place where the cloud settled down, there the sons of Israel would camp.

At the command of the Lord the sons of Israel would set out, and at the command of the Lord they would camp; as long as the cloud settled over the tabernacle, they remained camped.

Even when the cloud lingered over the tabernacle for many days, the sons of Israel would comply with the Lord’s ordinance and not set out.

If sometimes the cloud remained a few days over the tabernacle, in accordance with the command of the Lord they remained camped. Then in accordance with the command of the Lord they set out.