Revelation 20:1 in the King James Version
And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.
Context
1 I saw an angel coming down out of heaven, having the key of the abyss and a great chain in his hand.
2 He seized the dragon, the old serpent, who is the devil and Satan, who deceives the whole inhabited earth, and bound him for a thousand years,