Revelation 9:14-15, 20

one saying to the sixth angel that had the trumpet, Loose the four angels that are bound at the great river Euphrates. And the four angels were loosed, that had been prepared for the hour and day and month and year, that they should kill the third part of men.

And the rest of mankind, who were not killed with these plagues, repented not of the works of their hands, that they should not 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