Exodus 13:21-22

13:21 Now the Lord was going before them by day in a pillar of cloud to lead them in the way, and by night in a pillar of fire to give them light, so that they could travel day or night. 13:22 He did not remove the pillar of cloud by day nor the pillar of fire by night from before the people.

Psalms 99:7

99:7 He spoke to them from a pillar of cloud;

they obeyed his regulations and the ordinance he gave them.