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 4:9

And while the living creatures are giving glory, and honor, and thanks to him who sits upon the throne, who lives for ever and ever,

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 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 20:14

And death and hades were cast into the lake of fire: this is the second death.

Revelation 5:14

And the four living creatures said, Amen: and the elders fell down and worshiped him.

Revelation 20:1-2

And I saw an angel descending from heaven, who had the key of the abyss, and a great chain in his hand.

Treasury of Scripture Knowledge

Summary

I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.

Bible References

I am alive

Revelation 4:9
And while the living creatures are giving glory, and honor, and thanks to him who sits upon the throne, who lives for ever and ever,
Revelation 5:14
And the four living creatures said, Amen: and the elders fell down and worshiped him.

The keys

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 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 20:1
And I saw an angel descending from heaven, who had the key of the abyss, and a great chain in his hand.