'Pillar of Cloud' in the Bible

And in a pillar of cloud thou didst guide them by day, and in a pillar of fire by night, to enlighten the way to them that they shall go in it

And thou in thy many compassions forsookest them not in the desert: not removing the pillar of cloud from above them in the day to guide them in the way; and the pillar of fire in the night, to enlighten to them, and the way that they shall go in it