Revelation 9:14 in the King James Version
Saying to the sixth angel which had the trumpet, Loose the four angels which are bound in the great river Euphrates.
Context
13 The sixth angel sounded. I heard a voice from the horns of the golden altar which is before God,
14 saying to the sixth angel who had the trumpet, “Free the four angels who are bound at the great river Euphrates!”
15 The four angels were freed who had been prepared for that hour and day and month and year, so that they might kill one third of mankind.