'Pillar of Fire' in the Bible

And Jehovah went before them by day in a pillar of cloud, to lead them the way, and by night in a pillar of fire, to give them light, that they might go by day and by night:

the pillar of cloud by day, and the pillar of fire by night, departed not from before the people.

And it came to pass in the morning watch, that Jehovah looked forth upon the host of the Egyptians through the pillar of fire and of cloud, and discomfited the host of the Egyptians.