Exodus 40:33-38

Then he hung the curtains forming the courtyard around the Tabernacle and the altar. And he set up the curtain at the entrance of the courtyard. So at last Moses finished the work. LORD Then the cloud covered the Tabernacle, and the glory of the LORD filled the Tabernacle. Moses could no longer enter the Tabernacle because the cloud had settled down over it, and the glory of the LORD filled the Tabernacle. Now whenever the cloud lifted from the Tabernacle, the people of Israel would set out on their journey, following it. But if the cloud did not rise, they remained where they were until it lifted. The cloud of the LORD hovered over the Tabernacle during the day, and at night fire glowed inside the cloud so the whole family of Israel could see it. This continued throughout all their journeys.