Gog and Magog
The Gog prophecy is meant to be fulfilled at the approach of what is called the "end of days", but not necessarily the end of the world. Jewish eschatology viewed Gog and Magog as enemies to be defeated by the Messiah, which would usher in the age of the Messiah. Christianity's interpretation is more starkly apocalyptic: making Gog and Magog allies of Satan against God at the end of the millennium, as described in the Book of Revelation.