Revelation 9:11-16

Their king is the angel from the bottomless pit; his name in Hebrew is Abaddon, and in Greek, Apollyon—the Destroyer. The first terror is past, but look, two more terrors are coming! Then the sixth angel blew his trumpet, and I heard a voice speaking from the four horns of the gold altar that stands in the presence of God. And the voice said to the sixth angel who held the trumpet, “Release the four angels who are bound at the great Euphrates River.” Then the four angels who had been prepared for this hour and day and month and year were turned loose to kill one-third of all the people on earth. I heard the size of their army, which was 200 million mounted troops.