Revelation 20:1-4

Then I saw a mighty angel descending from the heavenly realm, holding a heavy chain and a key—the key of the deep. He seized the dragon, that ancient serpent known as the devil and Satan, and bound him for a thousand years. The mighty angel threw him into the pit, locked it, and sealed it so that he could no longer deceive the nations until the thousand years were over. (After that he must be loosed for a brief time.) Then I saw thrones, and those who sat on them were given the authority to judge. I also saw the souls of those who had been beheaded because of the testimony of Jesus and for the Word of God. They had refused to worship the wild beast or its image and did not have their foreheads or hands marked by the wild beast. They lived and reigned with the Christ for one thousand years.