Revelation 9

 ¹³ And the sixth angel sounded, and I heard a voice from the horns of the golden altar which is before God,

 ¹⁴ one saying to the sixth angel that had one trumpet, Loose the four angels that are bound at the great river Euphrates.

 ¹⁵ And 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.

 ¹⁶ And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.