Revelation 20:1-3

1Then I saw an angel coming down from heaven holding the key to the abyss and a great chain in his hand.

2He seized the dragon, that ancient serpent who is the devil and Satan, and bound him for a thousand years.

3He threw him into the abyss, closed it, and put a seal on it so that he would no longer deceive the nations until the thousand years were completed. After that, he must be released for a short time.