I am He who lives, and was dead, and behold, I am alive forevermore. Amen. And I have the keys of Hades and of Death.

The Faithful Church

“And to the angel of the church in Philadelphia write, ‘These things says He who is holy, He who is true, “He who has the key of David, He who opens and no one shuts, and shuts and no one opens”:

Fifth Trumpet: The Locusts from the Bottomless Pit

Then the fifth angel sounded: And I saw a star fallen from heaven to the earth. To him was given the key to the bottomless pit.

Satan Bound 1,000 Years

Then I saw an angel coming down from heaven, having the key to the bottomless pit and a great chain in his hand.