'Pillar of Fire' in the Bible

And the LORD went before them 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; 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.

And it came to pass, that in the morning watch the LORD looked unto the host of the Egyptians through the pillar of fire and of the cloud, and troubled the host of the Egyptians,

And they will tell it to the inhabitants of this land: for they have heard that you LORD are among this people, that you LORD are seen face to face, and that your cloud stands over them, and that you go before them, by daytime in a pillar of a cloud, and in a pillar of fire by night.

Moreover you led them in the day by a cloudy pillar; and in the night by a pillar of fire, to give them light in the way in which they should go.

Yet you in your manifold mercies forsook them not in the wilderness: the pillar of cloud departed not from them by day, to lead them in the way; neither the pillar of fire by night, to show them light, and the way in which they should go.