Exodus 13:20-24

Then they set out from Succoth and camped in Etham, on the edge of the wilderness.

And the Lord was going before them in a pillar of cloud by day to lead them on the way, and in a pillar of fire by night to give them light, so that they might travel by day and by night.

He did not take away the pillar of cloud by day, nor the pillar of fire by night, from the presence of the people.