The time is coming when the Lord will make every plant and tree in the land grow large and beautiful. All the people of Israel who survive will take delight and pride in the crops that the land produces.
Everyone who is left in Jerusalem, whom God has chosen for survival, will be called holy.
By his power the Lord will judge and purify the nation and wash away the guilt of Jerusalem and the blood that has been shed there.
Then over Mount Zion and over all who are gathered there, the Lord will send a cloud in the daytime and smoke and a bright flame at night. God's glory will cover and protect the whole city. 1
References for Isaiah 4:5
4.5 Ex 13.21; 24.16.
His glory will shade the city from the heat of the day and make it a place of safety, sheltered from the rain and storm.