Revelation 9:13-16

13Then the sixth angel blew his trumpet, and I heard a single voice coming from the horns on the golden altar that is before God,

14saying to the sixth angel, the one holding the trumpet, “Set free the four angels who are bound at the great river Euphrates!”

15Then the four angels who had been prepared for this hour, day, month, and year were set free to kill a third of humanity.

16The number of soldiers on horseback was two hundred million; I heard their number.