Exodus 40:32-38

Whenever they went into the tabernacle of meeting, and when they came near the altar, they washed, as the LORD had commanded Moses. And he raised up the court all around the tabernacle and the altar, and hung up the screen of the court gate. So Moses finished the work. Then the cloud covered the tabernacle of meeting, and the glory of the LORD filled the tabernacle. And Moses was not able to enter the tabernacle of meeting, because the cloud rested above it, and the glory of the LORD filled the tabernacle. Whenever the cloud was taken up from above the tabernacle, the children of Israel would go onward in all their journeys. But if the cloud was not taken up, then they did not journey till the day that it was taken up. For the cloud of the LORD was above the tabernacle by day, and fire was over it by night, in the sight of all the house of Israel, throughout all their journeys.