Exodus 40:34

31 In it the hands and feet of Moses and Aaron and his sons were washed,

32 Whenever they went into the Tent of meeting, and when they came near the altar, as the Lord had given orders to Moses.

33 And he put up the hangings forming the open space round the House and the altar, and put the curtain over the doorway. So Moses made the work complete.

34 Then the cloud came down covering the Tent of meeting, and the House was full of the glory of the Lord;

35 So that Moses was not able to go into the Tent of meeting, because the cloud was resting on it, and the House was full of the glory of the Lord.

36 And whenever the cloud was taken up from the House, the children of Israel went forward on their journey:

37 But while the cloud was there, they made no move till it was taken up.