Revelation 9:11-15 New English Translation (NET)

11. They have as king over them the angel of the abyss, whose name in Hebrew is Abaddon, and in Greek, Apollyon.

12. The first woe has passed, but two woes are still coming after these things!

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

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

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

Revelation 9