Revelation 20:1

Καὶ εἶδον ἄγγελον καταβαίνοντα ἐκ τοῦ οὐρανοῦ, ἔχοντα τὴν κλεῖν τῆς ἀβύσσου, καὶ ἅλυσιν μεγάλην ἐπὶ τὴν χεῖρα αὐτοῦ.

Kai eidon aggelon katabainonta ek toy oyranoy, echonta tēn klein tēs abyssoy, kai alysin megalēn epi tēn cheira aytoy.

King James Version (KJV)

And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.

Modern English

And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain.