Revelation 20:7

Revised Standard Version (RSV-CI)

And when the thousand years are ended, Satan will be loosed from his prison

Cross References

Revelation 20:2

And he seized the dragon, that ancient serpent, who is the Devil and Satan, and bound him for a thousand years,

Revelation 9:15

So the four angels were released, who had been held ready for the hour, the day, the month, and the year, to kill a third of mankind.