Revelation 20:8 in the King James Version
And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
Context
7 And after the thousand years, Satan will be released from his prison
8 and he will come out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to the war, whose number is as the sand of the sea.
9 They went up over the width of the earth and surrounded the camp of the saints and the beloved city. Fire came down out of heaven from God and devoured them.