Revelation 20:1
And I saw an angel coming down out of heaven, with the key of the bottomless pit and a great chain in his hand.
Revelation 1:18
I was dead, and behold, I am alive forevermore; and hold the keys of death and of Hades.
Revelation 10:1
And I saw another mighty angel coming down out of heaven, clad with a cloud; and a rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire.
Luke 8:31
So they besought Jesus not to command them to go away into the abyss.
2 Peter 2:4
For if God did not spare angels when they sinned, but cast them down to Tartarus, and committed them to chains of darkness, and reserved them for judgment;
Jude 1:6
while the angels who did not keep their first domain but left their proper abode, are held by him in blank darkness, in everlasting chains, in preparation for the judgment of the Great Day.
Revelation 9:1-2
Then the fifth angel blew his trumpet, and I saw a star fallen from heaven upon the earth; and to him was given the key to the bottomless pit.
Revelation 18:1
After this I saw another angel coming down from heaven, who had great authority; and the earth was illumined by his glory.