Isaiah 4:4-5

4when the Lord shall have washed away the filth of the daughters of Zion, and shall have scoured out the blood of Jerusalem from its midst, by the spirit of judgment, and by the spirit of burning.

5And Jehovah will create over every dwelling-place of mount Zion, and over its convocations, a cloud by day and a smoke, and the brightness of a flame of fire by night: for over all the glory shall be a covering.