Revelation 20:1-3

I saw an Angel descending out of Heaven. He carried the key to the Abyss and a chain—a huge chain. He grabbed the Dragon, that old Snake—the very Devil, Satan himself!—chained him up for a thousand years, dumped him into the Abyss, slammed it shut and sealed it tight. No more trouble out of him, deceiving the nations—until the thousand years are up. After that he has to be let loose briefly.