Revelation 20:7-9 And when the thousand years have expired, Satan will be loosed out of his prison.

MKJV⁽ⁱ⁾ ⁷ And when the thousand years have expired, Satan will be loosed out of his prison. ⁸ And he will 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 them is as the sand of the sea. ⁹ And they went up over the breadth of the earth and circled around the camp of the saints, and the beloved city. And fire came down from God out of Heaven and devoured them.