Revelation 20:4–10 focuses on the reign of Christ during the millennium: the thousand years of Christ’s rule on earth, as well as what happens at the end of that era. The millennial reign begins after the Devil is imprisoned in the bottomless pit (Revelation 20:1–3) and before the unrighteous dead of all periods of history are judged and consigned to the lake of fire (Revelation 20:11–15). These events precede the descent of the New Jerusalem from heaven (Revelation 21).
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“Revelation 20:10” Bibleref.com
10 The devil who deceived them was thrown into the lake of fire and sulfur, where the beast and the false prophet are also. They will be tormented day and night forever and ever.