Revelation 20:1–3 (ASV)

And I saw an angel coming down out of heaven, having the key of the abyss and a great chain in his hand. ²And he laid hold on the dragon, the old serpent, which is the Devil and Satan, and bound him for a thousand years, ³and cast him into the abyss, and shut it, and sealed it over him, that he should deceive the nations no more, until the thousand years should be finished: after this he must be loosed for a little time.