Exodus 40:32-38

They washed whenever they entered the tent of meeting or approached the altar, as the LORD commanded Moses. Then Moses set up the courtyard around the tabernacle and altar and put up the curtain at the entrance to the courtyard. And so Moses finished the work. LORD Then the cloud covered the tent of meeting, and the glory of the LORD filled the tabernacle. Moses could not enter the tent of meeting because the cloud had settled on it, and the glory of the LORD filled the tabernacle. In all the travels of the Israelites, whenever the cloud lifted from above the tabernacle, they would set out; but if the cloud did not lift, they did not set out—until the day it lifted. So the cloud of the LORD was over the tabernacle by day, and fire was in the cloud by night, in the sight of all the Israelites during all their travels.