Revelation 3:7
And by the messenger of the congregation in Philadelphia, write: These things says the Holy One, the True One; who has the key, the Son of David; he who opens and no man shuts; and shuts, and no man opens:
Revelation 1:18
I am he who lives and was dead; and behold, I am living for ever and ever; and I have the keys of the unseen world, and of death.
Revelation 9:1
And the fifth angel sounded; and I saw a Star fall from the heaven to the earth; and there was given to him the key of the bottomless pit.
Revelation 11:6
These have power to shut heaven, so that no rain shall be showered down in the days of their prophecy; they have power over the waters, to turn them to blood, and to smite the earth as often as they will, with every plague.
Revelation 20:1-3
And I saw an angel descending from heaven, who had the key of the abyss, and a great chain in his hand.