Rev 9:1-2

Revelation 9:1-2  Then the fifth angel sounded his trumpet, and I saw a star having fallen out of heaven, to the earth. And the key to the shaft of the bottomless pit was given to him.  2 And he opened the shaft of the bottomless pit, and smoke arose out of the pit like the smoke of a burning furnace. And the sun was darkened, and the air, from the smoke of the shaft.