Revelation 20:1
And I saw an angel descending from heaven, who had the key of the abyss, and a great chain in his hand.
Revelation 1:18
I am he who lives and was dead; and behold, I am living for ever and ever; and I have the keys of the unseen world, and of death.
Revelation 10:1
And I saw another mighty angel descending from heaven, clothed with a cloud; and a rainbow was about his head, and his face was as the sun, and his feet like pillars of fire.
2 Peter 2:4
For God, indeed, did not spare the angels who sinned, but with chains of darkness confining them in Tartarus, delivered them over to be kept for judgment;
Jude 1:6
Also, the angels who kept not their first estate, but left their proper habitation, he has reserved in everlasting chains, under darkness, to the judgment of the great day.
Revelation 9:1-2
And the fifth angel sounded; and I saw a Star fall from the heaven to the earth; and there was given to him the key of the bottomless pit.
Revelation 18:1
And after this, I saw an angel descending from heaven, who had great power; and the earth was enlightened with his glory.