Revelation 20:1
Then I saw an angel coming down from Heaven, with the key of the bottomless pit and a great chain in his hand.
Revelation 1:18
the Everliving. I died, and I am alive for ever and ever. And I hold the keys of the Grave and of the Place of the Dead.
Revelation 10:1
Then I saw another mighty angel, descending from Heaven. His robe was a cloud; over his head was the rainbow; his face was like the sun, and his feet like pillars of fire;
Luke 8:31
And the demons begged Jesus not to order them away into the bottomless pit.
2 Peter 2:4
Remember, God did not spare angels when they sinned, but sent them down to Tartarus, and committed them to caverns of darkness, to be kept under guard for judgment.
Jude 1:6
and that even those angels, who did not keep to their appointed spheres, but left their proper homes, have been kept by him for the judgment of the Great Day in everlasting chains and black darkness.
Revelation 9:1-2
Then the fifth angel blew; and I saw a Star that had fallen upon the earth from the heavens, and to him was given the key of the bottomless pit.
Revelation 18:1
After this I saw another angel, descending from Heaven, invested with great authority; and the earth was illuminated by his splendor.