Exodus 40:34-38

³⁴Then the cloud covered the tent of meeting, and the glory of Jehovah filled the tabernacle. ³⁵And Moses was not able to enter into the tent of meeting, because the cloud abode thereon, and the glory of Jehovah filled the tabernacle. ³⁶And when the cloud was taken up from over the tabernacle, the children of Israel went onward, throughout all their journeys: ³⁷but if the cloud was not taken up, then they journeyed not till the day that it was taken up. ³⁸For the cloud of Jehovah was upon the tabernacle by day, and there was fire therein by night, in the sight of all the house of Israel, throughout all their journeys.