Revelation 20:7 KJV
And when the thousand years are expired, Satan shall be loosed out of his prison,
Revelation 20:5–9 KJV Chapter Context
5
But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection.
6
Blessed and holy is 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.
7
And when the thousand years are expired, Satan shall be loosed out of his prison,
8
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.
9
And 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.