Exodus 40:36-38
Exodus 40:36-38 NIV
In all the travels of the Israelites, whenever the cloud lifted from above the tabernacle, they would set out; but if the cloud did not lift, they did not set out—until the day it lifted. So the cloud of the LORD was over the tabernacle by day, and fire was in the cloud by night, in the sight of all the Israelites during all their travels.