Revelation 7:14

And I said unto him, Sir, thou knowest. And he said to me, These are they who come out of great affliction, and have washed their robes, and made them white in the blood of the Lamb.

1 John 1:7

but if we walk in the light, as He is in the light, we have communion with one another, and the blood of Jesus Christ his Son cleanseth us from all sin.

Hebrews 9:14

how much more shall the blood of Christ, who through the eternal Spirit offered himself spotless to God, purify your conscience from dead works, that ye may serve the living God?

Revelation 1:5

and from Jesus Christ, who is the faithful witness, the first-born from the dead, and the ruler of the kings of the earth. To Him that loved us, and washed us from our sins in his own blood,

Revelation 22:14

Happy are they that do his commandments, so shall they have a right to the tree of life, and may enter in by the gates into the city.

Matthew 24:21

for there shall be then great affliction, such as has not been from the beginning of the world unto this time, no, nor ever shall be.

John 13:8-14

Peter saith to Him, Thou shalt never wash my feet. Jesus answered him, If I do not wash thee, thou hast no part with me.

John 16:33

These things have I spoken unto you, that in me ye might have peace. In the world ye shall have trouble: but be of good courage, I have overcome the world.

Acts 14:22

confirming the souls of the disciples, exhorting them to continue in the faith, and telling them that through many afflictions we must enter into the kingdom of God.

Romans 5:3

And not only so, but we also glory in tribulations, knowing that tribulation worketh patience,

1 Corinthians 6:11

And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the spirit of our God.

Ephesians 5:26-27

to sanctify and cleanse it with the washing of water by the word,

2 Thessalonians 1:4

so that we ourselves boast of you among the churches of God, for your patience and faith under all your persecutions and afflictions which ye endure.

Hebrews 13:12

Wherefore Jesus also, that He might sanctify the people by his own blood, suffered without the gate.

1 Peter 1:19

but with the precious blood of Christ as of a lamb without blemish and without spot:

Revelation 2:9

I know thy works and affliction and poverty (but thou art rich) and I know the blasphemy of those that say they are Jews, and are not, but are the synagogue of Satan.

Revelation 5:9

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

Revelation 6:9-11

And when He opened the fifth seal, I saw under the altar the souls of those that had been slain for the word of God, and for the testimony which they maintained.

Revelation 12:11

And they have overcome him by the blood of the Lamb, and by the word of their testimony, and they loved not their life unto the death.

Revelation 15:2

And I saw as it were a sea of glass mingled with fire; and those that had gained the victory from the beast, and from his image, and from his mark, and from the number of his name, standing on the sea of glass, and having harps to celebrate the praises of God.

Revelation 17:6

And I saw the woman drunk with the blood of the saints, and with the blood of the martyrs of Jesus: and when I saw her, I wondered with great amazement.

Treasury of Scripture Knowledge

Summary

And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.

General references

Bible References

And have

Revelation 1:5
and from Jesus Christ, who is the faithful witness, the first-born from the dead, and the ruler of the kings of the earth. To Him that loved us, and washed us from our sins in his own blood,
John 13:8
Peter saith to Him, Thou shalt never wash my feet. Jesus answered him, If I do not wash thee, thou hast no part with me.
1 Corinthians 6:11
And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the spirit of our God.
Ephesians 5:26
to sanctify and cleanse it with the washing of water by the word,
Hebrews 9:14
how much more shall the blood of Christ, who through the eternal Spirit offered himself spotless to God, purify your conscience from dead works, that ye may serve the living God?
1 John 1:7
but if we walk in the light, as He is in the light, we have communion with one another, and the blood of Jesus Christ his Son cleanseth us from all sin.

The blood

Revelation 5:9
And they sung a new song, saying, Worthy art thou to take the book, and to open its seals; for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe, and tongue, and people, and nation;
Revelation 12:11
And they have overcome him by the blood of the Lamb, and by the word of their testimony, and they loved not their life unto the death.
Hebrews 13:12
Wherefore Jesus also, that He might sanctify the people by his own blood, suffered without the gate.
1 Peter 1:19
but with the precious blood of Christ as of a lamb without blemish and without spot:

General references

Matthew 5:4
Blessed are they that mourn; for they shall be comforted.