Chapters fifteen and sixteen return to the picture of judgments poured out during the Tribulation, before the Second Coming and the “harvest” described in chapter fourteen. In chapter fifteen the scene is set. The seven plagues are called “final because in them God’s anger is completed” (Revelation 15:1). Before this final judgment, John saw the Tribulation martyrs worshiping God for the vengeance they were about to receive. As they sang, the final judgments were prepared.