Revelation 20:1-3

I saw an angel coming down out of heaven. He had the key to the Abyss. In his hand he held a heavy chain. He grabbed the dragon, that old serpent. The serpent is also called the devil, or Satan. The angel put him in chains for 1,000 years. Then he threw him into the Abyss. He locked it and sealed him in. This was to keep Satan from causing the nations to believe his lies anymore. Satan will be locked away until the 1,000 years are ended. After that, he must be set free for a short time.