'Pillar of Fire' in the Bible

And, in a pillar of cloud, didst thou lead them, by day, - and in a pillar of fire, by night, to light up for them the way wherein they should go.

yet, thou, in thine abounding compassions, didst not forsake them in the desert, - the pillar of cloud, departed not from over them by day, to lead them in the way, nor the pillar of fire by night, to light up for them the way wherein they should go.