Revelation 9:13 DBY

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;