Exodus 13:21
And the LORD went before them by day in a pillar of a cloud, to lead them the way; and by night in a pillar of fire, to give them light; to go by day and night:
Torrey's Topical Textbook—AKJV

Nehemiah 9:19
Yet you in your manifold mercies forsook them not in the wilderness: the pillar of the 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 wherein they should go.
Torrey's Topical Textbook—AKJV