Isaiah 4:3-5

And he who is left in Zion and remains in Jerusalem will be called holy, everyone who has been recorded for life in Jerusalem, when the Lord shall have washed away the filth of the daughters of Zion and cleansed the bloodstains of Jerusalem from its midst by a spirit of judgment and by a spirit of burning. Then the LORD will create over the whole site of Mount Zion and over her assemblies a cloud by day, and smoke and the shining of a flaming fire by night; for over all the glory there will be a canopy.