Revelation 9:14-15, 20

one saying to the sixth angel who had the trumpet, “Release the four angels who are bound at the great river Euphrates.” And the four angels, who had been prepared for the hour and day and month and year, were released, so that they would kill a third of mankind.

The rest of mankind, who were not killed by these plagues, did not repent of the works of their hands, so as not to worship demons, and the idols of gold and of silver and of brass and of stone and of wood, which can neither see nor hear nor walk