Revelation 9:13-16

13The sixth angel blew his trumpet. From the four horns of the golden altar that is before God, I heard a voice

14say to the sixth angel who had the trumpet, “Release the four angels bound at the great river Euphrates.”

15So the four angels who were prepared for the hour, day, month, and year were released to kill a third of the human race.

16The number of mounted troops was two hundred million; I heard their number.