Revelation 1:18; Revelation 3:7; Revelation 9:1; Revelation 20:1

Revelation 1:18

18 and the living One; and I was dead, and behold, I am alive forevermore, and I have the keys of death and of Hades.

Revelation 3:7

7 "And to the angel of the church in Philadelphia write: He who is holy, who is true, who has the key of David, who opens and no one will shut, and who shuts and no one opens, says this:

Revelation 9:1

1 Then the fifth angel sounded, and I saw a star from heaven which had fallen to the earth; and the key of the bottomless pit was given to him.

Revelation 20:1

1 Then I saw an angel coming down from heaven, holding the key of the abyss and a great chain in his hand.