And I saw an angel decending out of heaven — Coming down with a commission from God. Jesus Christ himself overthrew the beast: the proud dragon shall be bound by an angel; even as he and his angels were cast out of heaven by Michael and his angels. Having the key of the bottomless pit — Mentioned before, Revelation 9:1. And a great chain in his hand — The angel of the bottomless pit was shut up therein before the beginning of the first woe. But it is now first that Satan, after he had occasioned the third woe, is both chained and shut up.
Related Commentaries of Revelation 20:1
Revelation 20:1
1 And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.