Exodus 40:34-38

34The cloud covered the tent of meeting, and the glory of the Lord filled the tabernacle.

35Moses was unable to enter the tent of meeting because the cloud rested on it, and the glory of the Lord filled the tabernacle.

36The Israelites set out whenever the cloud was taken up from the tabernacle throughout all the stages of their journey.

37If the cloud was not taken up, they did not set out until the day it was taken up.

38For the cloud of the Lord was over the tabernacle by day, and there was a fire inside the cloud by night, visible to the entire house of Israel throughout all the stages of their journey.