Exodus 13:21-22

New Revised Standard Version, Anglicised

²¹ The Lord went in front of them in a pillar of cloud by day, to lead them along the way, and in a pillar of fire by night, to give them light, so that they might travel by day and by night. ²² Neither the pillar of cloud by day nor the pillar of fire by night left its place in front of the people.