Revelation 20:7

And when the thousand years are expired, Satan shall be loosed out of his prison,
— Revelation 20:7, King James Version

In other translations

World English Bible (WEB)

And after the thousand years, Satan will be freed out of his prison,

American Standard Version (ASV)

And when the thousand years are finished, Satan shall be loosed out of his prison,

Young's Literal Translation (YLT)

And when the thousand years may be finished, the Adversary shall be loosed out of his prison,