Revelation 7:14

And I said to him, My lord, thou knowest. And he said to me, These are they who come out of the great tribulation, and they 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 his Son cleanseth us from all sin.

Hebrews 9:14

how much more shall the blood of Christ, who by his everlasting spirit offered himself without spot to God, purify your conscience from dead works, for the worship of the living God!

Revelation 1:5

and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him that loveth us, and washed us from our sins in his own blood,

Revelation 22:14

Blessed are they that wash their robes, that they may have a right to the tree of life, and may enter by the gates into the city.

Matthew 24:21

For there will then be great distress, such as hath not been from the beginning of the world to this time; no, nor shall ever be.

John 13:8-14

Peter saith to 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 to you, that in me ye may have peace. In the world ye have tribulation; but be of good cheer; I have overcome the world.

Acts 14:22

confirming the souls of the disciples, exhorting them to continue in the faith, and saying that it is through many afflictions that we mast enter into the kingdom of God.

Romans 5:3

And not only so, but we rejoice in afflictions also, knowing that affliction produceth endurance,

1 Corinthians 6:11

And such were some of you; but ye were washed, but ye were made holy, but ye were accepted as righteous in the name of the Lord Jesus, and in the Spirit of our God.

Ephesians 5:26-27

that he might sanctify it, having cleansed it by the bath of the water in the word;

2 Thessalonians 1:4

so that we ourselves glory in you among the churches of God, for your constancy and faith in all your persecutions and the 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 affliction and poverty, (but thou art rich,) and the blasphemy of those who say they are Jews, and are not, but are a synagogue of Satan.

Revelation 5:9

And they sing a new song, saying, Thou art worthy to take the book, and to open its seals; for thou wast slain, and hast redeemed to God by thy blood men out of every tribe 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 on account of the word of God, and on account of the testimony which they had borne;

Revelation 12:11

and they conquered him because of the blood of the Lamb, and because of the word of their testimony; and they loved not their lives, even to death.

Revelation 15:2

And I saw as it were a sea of glass mingled with fire, and those who had gained the victory over the beast, and over his image, and over the number of his name, standing at the sea of glass, having harps of God.

Revelation 17:6

And I saw the woman drunken with the blood of the saints, and with the blood of the witnesses of Jesus. And when I saw her, I wondered with great wonder.

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, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him that loveth 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 wash thee not, thou hast no part with me.
1 Corinthians 6:11
And such were some of you; but ye were washed, but ye were made holy, but ye were accepted as righteous in the name of the Lord Jesus, and in the Spirit of our God.
Ephesians 5:26
that he might sanctify it, having cleansed it by the bath of the water in the word;
Hebrews 9:14
how much more shall the blood of Christ, who by his everlasting spirit offered himself without spot to God, purify your conscience from dead works, for the worship of 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 his Son cleanseth us from all sin.

The blood

Revelation 5:9
And they sing a new song, saying, Thou art worthy to take the book, and to open its seals; for thou wast slain, and hast redeemed to God by thy blood men out of every tribe and tongue and people and nation,
Revelation 12:11
and they conquered him because of the blood of the Lamb, and because of the word of their testimony; and they loved not their lives, even to 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 who mourn; for they will be comforted.