Revelation 20:7-9

7And when the thousand years are completed, Satan will be released from his prison (the abyss),

8and will come out to deceive and mislead the nations which are in the four corners of the earth—[including] Gog and Magog—to gather them together for the war; their number is like the sand of the seashore.

9And they swarmed up over the broad plain of the earth and surrounded the camp of the saints (God’s people) and the beloved city [Jerusalem]; but fire came down from heaven and consumed them.