Exodus 40:34-38

And the cloud covered the tent of meeting, and the glory of Jehovah filled the tabernacle. And Moses could not enter into the tent of meeting, for the cloud abode on it, and the glory of Jehovah filled the tabernacle. And when the cloud was taken up from over the tabernacle, the children of Israel journeyed in all their journeys. And if the cloud were not taken up, then they did not journey until the day that it was taken up. For the cloud of Jehovah was on the tabernacle by day, and fire was in it by night, before the eyes of all the house of Israel, throughout all their journeys.