Revelation 20:1
Then I saw an angel descend from heaven with the key of the abyss and a huge chain in his hand;
Revelation 1:18
I was dead and here I am alive for evermore, holding the keys that unlock death and Hades.
Revelation 10:1
Then I saw another strong angel descend from heaven; he was clad in a cloud, with a rainbow over his head, his face like the sun, his feet like columns of fire,
Luke 8:31
And they begged him not to order them off to the abyss.
2 Peter 2:4
For if God did not spare angels who had sinned, but committing them to pits of the nether gloom in Tartarus, reserved them under punishment for doom:
Jude 1:6
while the angels who abandoned their own domain, instead of preserving their proper rank, are reserved by him within the nether gloom, in chains eternal, for the doom of the great Day ??7 just as Sodom and Gomorra and the adjacent cities, which similarly glutted themselves with vice and sensual perversity, are exhibited as a warning of the everlasting fire they are sentenced to suffer.
Revelation 9:1-2
The fifth angel blew, and I saw a Star which had dropped from heaven to earth; he was given the key of the pit of the abyss,
Revelation 18:1
After that I saw another angel descend from heaven, great in might; his radiance lit up the earth,