When the sixth angel blew his trumpet, a third of the rebellious people on earth died. But the rest of the rebellious people did not repent of their false worship or of their evil practices.

Revelation 9:13-21

13 The sixth angel blew his trumpet. Then I heard a voice from the four corners of the golden altar that is in God’s presence. 14 It was saying to the sixth angel, the one who had the trumpet, “Release the four angels whom I have bound at the great river Euphrates!” 15 The four angels were released, those who had been {He released the four angels, whom God had} kept ready for that exact hour of that day, of that month, of that year. They were released {He released them} in order that they might enable their soldiers to kill a third of the rebellious people. 16 The number of the soldiers riding on horses who did that was 200 million. I heard someone say how many there were. 17 In the vision I saw what the horses and the beings that rode them looked like. They wore breastplates that were red like fire, dusky blue like smoke, and yellow like sulfur. The heads of the horses were like the heads of lions. From their mouths came fire, smoke, and fumes of burning sulfur. 18 Those three things—the fire, the smoke, and the burning sulfur from the horses’ mouths—killed a third of the rebellious people. 19 The horses had power with their mouths and with their tails. Their tails have heads like snakes by which they harm people. 20 The rest of the rebellious people, those who were not killed by these plagues of fire and smoke and burning sulfur, did not turn from their sinful behavior. They did not stop worshipping the idols that they had made with their own hands. They did not stop worshipping demons and idols that were made of gold, of silver, of bronze, of stone, and of wood, even though they are idols that can neither see nor hear nor walk. 21 They did not stop murdering people, or practicing sorcery, or acting in sexually immoral ways, or stealing things.