¹³ Then the sixth angel blew [his] trumpet, and from the four horns of the golden altar which stands before God I heard a solitary voice,

¹⁴ Saying to the sixth angel who had the trumpet, Liberate the four angels who are bound at the great river Euphrates.

¹⁵ So the four angels who had been in readiness for that hour in the appointed day, month, and year were liberated to destroy a third of mankind.