“I saw an angel come down from heaven, carrying the key to the deep pit and a big chain. He chained the dragon for thousands of years. It is that old snake, who is also known as the devil and Satan. Then the angel threw the dragon into the pit. He locked and sealed it, so that thousand years would go by before the dragon could fool the nations again. But after that, it would have to set it free for a little while"

-Revelations 20:1-3