'Pillar of Fire' in the Bible

And Jehovah went before their face by day in a pillar of a cloud, to lead them in the way; and by night in a pillar of fire, to give them light; so that they could go day and night.

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

And it came to pass in the morning watch, that Jehovah looked upon the camp of the Egyptians, in the pillar of fire and of the cloud, and embarrassed the camp of the Egyptians.