Then the fifth angel blew his trumpet, and I saw a star that had fallen to earth from the sky, and he was given the key to the shaft of the bottomless pit.
References for Revelation 9:1
When he opened it, smoke poured out as though from a huge furnace, and the sunlight and air turned dark from the smoke.
Then locusts came from the smoke and descended on the earth, and they were given power to sting like scorpions.
They were told not to harm the grass or plants or trees, but only the people who did not have the seal of God on their foreheads.
They were told not to kill them but to torture them for five months with pain like the pain of a scorpion sting.
In those days people will seek death but will not find it. They will long to die, but death will flee from them!