Exodus 40:28-40:38

Then he put up the screen for the entrance of the Tabernacle. At the entrance of the Tabernacle of the Tent of Meeting he placed the altar of burnt offering. On it he offered up the burnt offering and the meal offering--as the Lord had commanded Moses. He placed the laver between the Tent of Meeting and the altar, and put water in it for washing. From it Moses and Aaron and his sons would wash their hands and feet; they washed when they entered the Tent of Meeting and when they approached the altar--as the Lord had commanded Moses. And he set up the enclosure around the Tabernacle and the altar, and put up the screen for the gate of the enclosure. When Moses had finished the work, the cloud covered the Tent of Meeting, and the Presence of the Lord filled the Tabernacle. Moses could not enter the Tent of Meeting, because the cloud had settled upon it and the Presence of the Lord filled the Tabernacle. When the cloud lifted from the Tabernacle, the Israelites would set out, on their various journeys; but if the cloud did not lift, they would not set out until such time as it did lift. For over the Tabernacle a cloud of the Lord rested by day, and fire would appear in it by night, in the view of all the house of Israel throughout their journeys.