Revelation 9:13-21

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. For the lethal power of the horses was in their mouths and their tails, and their tails had snakes’ heads that inflict injuries. Those not killed by these plagues did not repent of their deeds so that they would stop worshiping demons and idols of gold, silver, bronze, stone, and wood—blind and mute idols that have to be carried around. And they did not repent of their murders or their sorceries or their thefts or their immorality.