Revelation 20:2 – 3
New International Version (NIV)
2 He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years. 3 He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations anymore until the thousand years were ended. After that, he must be set free for a short time.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=revelation+20.2-3&version=NIV