their hair like women's hair, and their teeth like lions' teeth;
they had scales like iron breastplates, and the noise of their wings was like the noise of many chariots with horses rushing into battle.
They have tails like scorpions, with stingers, and in their tails is their power to harm people for five months.
They have as king over them the angel of the bottomless pit; his name in Hebrew is Abaddon, and in Greek he is called Apollyon.
References for Revelation 9:11
The first woe has passed. There are still two woes to come.
Then the sixth angel blew his trumpet, and I heard a voice from the four horns of the golden altar before God,
References for Revelation 9:13
saying to the sixth angel who had the trumpet, "Release the four angels who are bound at the great river Euphrates."
So the four angels were released, who had been held ready for the hour, the day, the month, and the year, to kill a third of humankind.
The number of the troops of cavalry was two hundred million; I heard their number.
And this was how I saw the horses in my vision: the riders wore breastplates the color of fire and of sapphire and of sulfur; the heads of the horses were like lions' heads, and fire and smoke and sulfur came out of their mouths.
References for Revelation 9:17
By these three plagues a third of humankind was killed, by the fire and smoke and sulfur coming out of their mouths.