Exodus 13:20-22

And they took their journey from Succoth, and encamped in Etham, in the edge of the wilderness. And the LORD went before them by day in a pillar of a cloud, to lead them the way; and by night in a pillar of fire, to give them light; to go by day and night: he took not away the pillar of the cloud by day, nor the pillar of fire by night, from before the people.