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 6:10

And they cried with a loud voice, and said, How long, O sovereign Lord, holy and true, before thou dost judge, and avenge our blood upon those who dwell on the earth?

1 John 5:20

Moreover, we know that the Son of God has come, and has given us understanding, that we might know him that is true; and we are in him that is true-in his Son Jesus Christ. This is the true God, and the eternal life.

Revelation 3:14

And by the messenger of the congregation in Laodicea, write: These things says the AMEN, the Faithful and true Witness, the Beginning of the creation of God:

Revelation 1:11

saying, What you see, write in a book, and send it to the seven congregations; to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

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 19:11

And I saw heaven opened, and behold, a white horse; and he that sat upon it was called Faithful and True; and he judges and makes war in righteousness:

Revelation 1:5

and from Jesus Christ, the faithful witness, the first born of the dead, and the ruler of the kings of the earth; to him who has loved us, and washed us from our sins in his own blood,

Revelation 2:1

By the messenger of the congregation in Ephesus, write: These things, says he who holds the seven stars in his right hand, who walks in the midst of the seven golden lamps:

Revelation 4:8

And the four living creatures had, each of them, six wings round about; and within they were full of eyes: and they rest not, day or night, saying, Holy, holy, holy, Lord God Almighty, who wast, and art, and art to come.

Revelation 5:3-5

And one in heaven, nor upon the earth, nor under the earth, was able to open the scroll, or to look into it.

Revelation 5:9

And they sung a new song, saying, Worthy art thou to take the scroll, and to open the seals of it; for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe, and language, and people, and nation;

Revelation 15:3

And they sang the song of Moses, the servant of God, and the song of the Lamb; saying, Great and wonderful are thy works, O Lord God Almighty; righteous and true are thy ways, O King of Saints.

Revelation 16:7

And I heard a voice from the altar, saying, Yes, O Lord God Almighty, true and righteous are thy judgments.

Revelation 19:2

for his judgments are true and righteous; for he has judged the great harlot, who corrupted the earth with her fornication; and he has avenged the blood of his servants shed by her hand.

Revelation 21:5

And he that sat upon the throne, said, Behold, I make all things new. And he said, Write, for these are true and faithful words.

Treasury of Scripture Knowledge

Summary

And to the angel of the church in Philadelphia write; These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth;

The key

He that openeth

Bible References

He that is holy

Revelation 4:8
And the four living creatures had, each of them, six wings round about; and within they were full of eyes: and they rest not, day or night, saying, Holy, holy, holy, Lord God Almighty, who wast, and art, and art to come.
Revelation 6:10
And they cried with a loud voice, and said, How long, O sovereign Lord, holy and true, before thou dost judge, and avenge our blood upon those who dwell on the earth?

He that is true

Revelation 3:14
And by the messenger of the congregation in Laodicea, write: These things says the AMEN, the Faithful and true Witness, the Beginning of the creation of God:
Revelation 1:5
and from Jesus Christ, the faithful witness, the first born of the dead, and the ruler of the kings of the earth; to him who has loved us, and washed us from our sins in his own blood,
Revelation 6:10
And they cried with a loud voice, and said, How long, O sovereign Lord, holy and true, before thou dost judge, and avenge our blood upon those who dwell on the earth?
Revelation 15:3
And they sang the song of Moses, the servant of God, and the song of the Lamb; saying, Great and wonderful are thy works, O Lord God Almighty; righteous and true are thy ways, O King of Saints.
Revelation 16:7
And I heard a voice from the altar, saying, Yes, O Lord God Almighty, true and righteous are thy judgments.
Revelation 19:2
for his judgments are true and righteous; for he has judged the great harlot, who corrupted the earth with her fornication; and he has avenged the blood of his servants shed by her hand.
Revelation 21:5
And he that sat upon the throne, said, Behold, I make all things new. And he said, Write, for these are true and faithful words.
1 John 5:20
Moreover, we know that the Son of God has come, and has given us understanding, that we might know him that is true; and we are in him that is true-in his Son Jesus Christ. This is the true God, and the eternal life.

The key

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.

He that openeth

Revelation 5:3
And one in heaven, nor upon the earth, nor under the earth, was able to open the scroll, or to look into it.