Revelation 9:11-13

Amplified Bible

¹¹ They have as king over them, the angel of the abyss (the bottomless pit); in Hebrew his name is Abaddon (destruction), and in Greek he is called Apollyon (destroyer-king).

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

The Sixth Trumpet—Army from the East

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