Zechariah 14
Now this will be the plague with which the LORD will strike all the peoples who have gone to war against Jerusalem; their flesh will rot while they stand on their feet, and their eyes will rot in their sockets, and their tongue will rot in their mouth.
Zech 14 is not a neutron bomb or any other kind of human weapon. If you carefully read the text, you soon realize that this is a description of direct action on the part of God Himself. Zech 14 is describing the aftermath of Christ’s return to Earth. This is what is waiting for those who refuse to accept Christ.