Revelation 20:7-9

7When the thousand years are completed, Satan will be released from his prison

8and will go out to deceive the nations at the four corners of the earth, Gog and Magog, to gather them for battle. Their number is like the sand of the sea.

9They came up across the breadth of the earth and surrounded the encampment of the saints, the beloved city. Then fire came down from heaven and consumed them.