Revelation 9:13-16

13When the sixth angel blew his trumpet, I heard a voice from the four horns of the gold altar in front of God.

14The voice said to the sixth angel who had the trumpet, “Release the four angels who are held at the great Euphrates River.”

15The four angels who were ready for that hour, day, month, and year were released to kill one-third of humanity.

16The soldiers on horses numbered 20,000 times 10,000. I heard how many there were.