Exodus 40:34-38

34Then the cloud [the Shekinah, God’s visible, dwelling presence] covered the Tent of Meeting, and the glory and brilliance of the Lord filled the tabernacle.

35Moses was not able to enter the Tent of Meeting because the cloud remained on it, and the glory and brilliance of the Lord filled the tabernacle.

36In all their journeys, whenever the cloud was taken up from over the tabernacle, the Israelites would set out;

37but if the cloud was not taken up, then they did not journey on until the day when it was taken up.

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