Revelation 20:7

English Standard Version 2016

And when the thousand years are ended, Satan will be released 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, who had been prepared for the hour, the day, the month, and the year, were released to kill a third of mankind.