Revelation 9:13-18

Then the sixth angel sounded his trumpet, and I heard a voice from the four horns of the golden altar before God, responding to the sixth angel, who blew his trumpet, “Set free the four angels who are confined at the great river Euphrates.” So the four angels were released, who had been prepared for the right hour, day, month, and year, to kill a third of humanity. I heard the number of soldiers on horseback—it was twice ten thousand times ten thousand. And in my vision I saw the horses with riders wearing breastplates of fire and of sapphire and of sulfur. The horses had lions’ heads breathing out fire and smoke and sulfur. They killed a third of humanity by these three plagues—the fire, the smoke, and the sulfur that came from their mouths.