Revelation 9:10-20

10 They have tails like scorpions, with stingers, and in their tails is their power to harm people for five months.
11 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.
12 The first woe has passed. There are still two woes to come.
13 Then the sixth angel blew his trumpet, and I heard a voice from the four horns of the golden altar before God,
14 saying to the sixth angel who had the trumpet, "Release the four angels who are bound at the great river Euphrates."
15 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.
16 The number of the troops of cavalry was two hundred million; I heard their number.
17 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.
18 By these three plagues a third of humankind was killed, by the fire and smoke and sulfur coming out of their mouths.
19 For the power of the horses is in their mouths and in their tails; their tails are like serpents, having heads; and with them they inflict harm.
20 The rest of humankind, who were not killed by these plagues, did not repent of the works of their hands or give up worshiping demons and idols of gold and silver and bronze and stone and wood, which cannot see or hear or walk.

Footnotes 4

New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.