Revelation 20:7
King James Version
“And when the thousand years are expired, Satan shall be loosed out of his prison,”
Context
4And I saw thrones, and they sat upon them, and judgment was given unto them: and the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.
5But the rest of the dead lived not again until the thousand years were finished. This the first resurrection.
6Blessed and holy he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
7And when the thousand years are expired, Satan shall be loosed out of his prison,
8And 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 as the sand of the sea.
9And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
10And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet and shall be tormented day and night for ever and ever.