Exodus 40:38 WEB

³⁶  When the cloud was taken up from over the tent, the children of Israel went onward, throughout all their journeys;

³⁷  but if the cloud wasn't taken up, then they didn't travel until the day that it was taken up.

³⁸  For the cloud of Yahweh was on the tent by day, and there was fire in the cloud by night, in the sight of all the house of Israel, throughout all their journeys.