Revelation 9:13-15

Authorized (King James) Version

¹³ And the sixth angel sounded, and I heard a voice from the four horns of the golden altar which is before God, ¹⁴ saying to the sixth angel which had the trumpet, Loose the four angels which are bound in the great river Euphrates. ¹⁵ And the four angels were loosed, which were prepared for an hour, and a day, and a month, and a year, for to slay the third part of men.