In Context

10 and they have tails like scorpions, and stings; and their power was in their tails to hurt men five months.

11 They have a king over them, the angel of the abyss: his name in Hebrew, Abaddon, and in Greek he has for name Apollyon.

12 The first woe has passed. Behold, there come yet two woes after these things.

13 And the sixth angel sounded his trumpet: and I heard a voice from the four horns of the golden altar which is before God,

14 saying to the sixth angel that had the trumpet, Loose the four angels which are bound at the great river Euphrates.

15 And the four angels were loosed, who are prepared for the hour and day and month and year, that they might slay the third part of men;

Revelation 9:13 in Other Translations