Revelation 7:14

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.

1 John 1:7

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

Zechariah 3:3-5

Now Joshua was clothed with filthy garments, and stood before the angel.

Hebrews 9:14

How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?

Isaiah 1:18

Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.

Revelation 1:5

And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,

Revelation 22:14

Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.

Exodus 37:3

And he cast for it four rings of gold, to be set by the four corners of it; even two rings upon the one side of it, and two rings upon the other side of it.

Zechariah 13:1

In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness.

Matthew 24:21

For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.

John 13:8-14

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

John 16:33

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

Acts 14:22

Confirming the souls of the disciples, and exhorting them to continue in the faith, and that we must through much tribulation enter into the kingdom of God.

Romans 5:3

And not only so, but we glory in tribulations also: 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

That he might sanctify and cleanse it with the washing of water by the word,

2 Thessalonians 1:4

So that we ourselves glory in you in the churches of God for your patience and faith in all your persecutions and tribulations that ye endure:

Hebrews 13:12

Wherefore Jesus also, that he might sanctify the people with 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 tribulation, and poverty, (but thou art rich) and I know the blasphemy of them which say they are Jews, and are not, but are the synagogue of Satan.

Revelation 5:9

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

Revelation 6:9-11

And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:

Revelation 12:11

And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.

Revelation 15:2

And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.

Revelation 17:6

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

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.

Bible References

Thou

Exodus 37:3
And he cast for it four rings of gold, to be set by the four corners of it; even two rings upon the one side of it, and two rings upon the other side of it.

And have

Revelation 1:5
And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,
Isaiah 1:18
Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
Zechariah 3:3
Now Joshua was clothed with filthy garments, and stood before the angel.
Zechariah 13:1
In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness.
John 13:8
Peter saith unto him, Thou shalt never wash my feet. Jesus answered him, If I wash thee not, 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
That he might 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 without spot to God, purge your conscience from dead works to serve the living God?
1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship one with 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, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;
Revelation 12:11
And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
Hebrews 13:12
Wherefore Jesus also, that he might sanctify the people with 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

Genesis 22:8
And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.
Leviticus 15:5
And whosoever toucheth his bed shall wash his clothes, and bathe himself in water, and be unclean until the even.
Zechariah 3:3
Now Joshua was clothed with filthy garments, and stood before the angel.
Matthew 5:4
Blessed are they that mourn: for they shall be comforted.

King James Version Public Domain