Revelation 9:10-14

And they had tails like unto scorpions, and there were stings in their tails: and their power was to hurt men five months.

And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon.

One woe is past; and, behold, there come two woes more hereafter.

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

Saying to the sixth angel which had the trumpet, Loose the four angels which are bound in the great river Euphrates.