Numbers 9:15-17

15On the day the Tabernacle was erected, the cloud covered the Tabernacle. By evening until morning, the cloud above the Tent of Testimony had an appearance like fire.

16It was that way continually. The cloud covered it, and by night it appeared like fire.

17Whenever the cloud lifted up from above the Tent, then Bnei-Yisrael would set out, and at the place where the cloud settled, there Bnei-Yisrael would encamp.