'Pillar of Cloud' in the Bible

And the Lord came down in a pillar of cloud, taking his place at the door of the Tent, and made Aaron and Miriam come before him.

And they will give the news to the people of this land: they have had word that you, Lord, are present with this people, letting yourself be seen face to face, and that your cloud is resting over them, and that you go before them in a pillar of cloud by day and in a pillar of fire by night.