Revelation 20:1
And I saw an angel come down from heaven, who had the key of the bottomless pit, and a great chain in his hand.
Revelation 1:18
I am the first and the last, who live, though I was dead; and behold, I am alive for ever and ever, Amen, and have the keys of hades and of death.
Revelation 10:1
And I saw another mighty angel coming down from heaven invested with a cloud: and there was a rainbow on his head, and his face was as the sun, and his feet as pillars of fire.
Luke 8:31
And they besought Him that He would not command them to go into the abyss:
2 Peter 2:4
For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgement; and if He spared not the old world,
Jude 1:6
and the angels that kept not their primitive state, but left their proper abode, hath He reserved in everlasting chains, under darkness, to the judgement of the great day:
Revelation 9:1-2
And the fifth angel sounded his trumpet, and I saw a star fall from heaven to the earth: and the key of the bottomless pit was given to him.
Revelation 18:1
And after these things I saw another angel come down from heaven, having great power; and the earth was enlightened with his glory.