Revelation 20:1
And I saw an angel descending from the heaven, having the key of the abyss, and a great chain in his hand.
Revelation 1:18
and the living one: and I became dead, and behold, I am living to the ages of ages, and have the keys of death and of hades.
Revelation 10:1
And I saw another strong angel coming down out of the heaven, clothed with a cloud, and the rainbow upon his head, and his countenance as the sun, and his feet as pillars of fire,
Luke 8:31
And they besought him that he would not command them to go away into the bottomless pit.
2 Peter 2:4
For if God spared not the angels who had sinned, but having cast them down to the deepest pit of gloom has delivered them to chains of darkness to be kept for judgment;
Jude 1:6
And angels who had not kept their own original state, but had abandoned their own dwelling, he keeps in eternal chains under gloomy darkness, to the judgment of the great day;
Revelation 9:1-2
And the fifth angel sounded his trumpet: and I saw a star out of the heaven fallen to the earth; and there was given to it the key of the pit of the abyss.
Revelation 18:1
After these things I saw another angel descending out of the heaven, having great authority: and the earth was lightened with his glory.