Revelation 20:1
Afterwards I saw an angel come down from heaven, having the key of the bottomless pit, with a great chain in his hand.
Revelation 1:18
I am he that liveth; I was dead; but now you see I am alive for all eternity, amen; and I have the keys of the grave, and of death."
Revelation 10:1
Then I saw another mighty angel come down from heaven, invested with a cloud, a rainbow was upon his head, his face was like the sun, and his feet like pillars of fire.
Luke 8:31
and they entreated him not to condemn them to the abyss.
2 Peter 2:4
for since God did not spare the angels, who had sinned, but having precipitated them to hell, confin'd them to chains of darkness, where they are reserv'd for judgment:
Jude 1:6
and the angels which kept not their original dignity, but deserted their proper abode, he hath 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 heaven unto the earth: and to him was given the key of the bottomless pit.
Revelation 18:1
After this I saw another angel come down from heaven, having great power; and the earth was lightned with his glory.