Revelation 9:13-16

13And the sixth angel sounded, and I heard a voice from the horns of the golden altar which is before God, 14one saying to the sixth angel that had the trumpet, Loose the four angels that are bound at the great river Euphrates. 15And the four angels were loosed, that had been prepared for the hour and day and month and year, that they should kill the third part of men. 16And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.