Exodus 40:33

³¹  And Moses and Aaron and his sons washed their hands and their feet thereat:

³²  When they went into the tent of the congregation, and when they came near unto the altar, they washed; as the LORD commanded Moses.

³³  And he reared up the court round about the tabernacle and the altar, and set up the hanging of the court gate. So Moses finished the work.

³⁴  Then a cloud covered the tent of the congregation, and the glory of the LORD filled the tabernacle.

³⁵  And Moses was not able to enter into the tent of the congregation, because the cloud abode thereon, and the glory of the LORD filled the tabernacle.