'Pillar of Fire' in the Bible

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

He did not remove the pillar of cloud by day nor the pillar of fire by night from before the people.

In the morning watch the Lord looked down on the Egyptian army through the pillar of fire and cloud, and he threw the Egyptian army into a panic.