'Pillar of Fire' in the Bible

Now, Yahweh, was going 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 journey day and night:

the pillar of cloud by day ceased not, nor the pillar of fire by night, - from before the people.

And it came to pass in the morning watch, that Yahweh looked down into the camp of the Egyptians, through the pillar of fire and cloud, and confused the camp of the Egyptians;