Exodus 40:30-38

He placed the Washbasin between the Tent of Meeting and the Altar, and filled it with water for washing. Moses and Aaron and his sons washed their hands and feet there. When they entered the Tent of Meeting and when they served at the Altar, they washed, just as GOD had commanded Moses. Finally, he erected the Courtyard all around The Dwelling and the Altar, and put up the screen for the Courtyard entrance. Moses finished the work. The Cloud covered the Tent of Meeting, and the Glory of GOD filled The Dwelling. Moses couldn’t enter the Tent of Meeting because the Cloud was upon it, and the Glory of GOD filled The Dwelling. Whenever the Cloud lifted from The Dwelling, the People of Israel set out on their travels, but if the Cloud did not lift, they wouldn’t set out until it did lift. The Cloud of GOD was over The Dwelling during the day and the fire was in it at night, visible to all the Israelites in all their travels.