Numbers 9:15-17

15Now on the day that the tabernacle was raised up, the cloud covered the tabernacle, the tent of the Testimony; from evening until morning it was above the tabernacle like the appearance of fire.

16So it was always: the cloud covered it by day, and the appearance of fire by night.

17Whenever the cloud was taken up from above the tabernacle, after that the children of Israel would journey; and in the place where the cloud settled, there the children of Israel would pitch their tents.