Revelation 7:14

'My Lord,' I answered, 'it is you who know.' 'These,' he said, 'are they who come through the Great Persecution; they washed their robes white in the blood of the Lamb.

1 John 1:7

But, if our lives are lived in the Light, as God himself is in the Light, we have communion with one another, and the Blood of Jesus, his Son, purifies us from all sin.

Hebrews 9:14

how much more will the blood of the Christ, who, through his eternal Spirit, offered himself up to God, as a victim without blemish, purify our consciences from a lifeless formality, and fit us for the service of the Living God!

Revelation 1:5

and from Jesus Christ, ' the faithful Witness, the First-born from the dead, and the Ruler of all the Kings of the earth.' To him who loves us and freed us from our sins by his own blood--

Revelation 22:14

Blessed will they be who wash their robes, that they may have the right to approach the Tree of Life, and may enter the City by the gates.

Matthew 24:21

for that will be 'a time of great distress, the like of which has not occurred from the beginning of the world down to the present time'--no, nor ever will again.

John 13:8-14

"You shall never wash my feet!" exclaimed Peter. "Unless I wash you," answered Jesus, "you have nothing in common with me."

John 16:33

I have spoken to you in this way, so that in me you may find peace. In the world you will find trouble; yet, take courage! I have conquered the world."

Acts 14:22

Reassuring the minds of the disciples, urging them to remain true to the Faith, and showing that it is only through many troubles that we can enter the Kingdom of God.

Romans 5:3

And not only that, but let us also exult in our troubles;

1 Corinthians 6:11

Such some of you used to be; but you washed yourselves clean. You became Christ's People! you were pronounced righteous through the Name of our Lord Jesus Christ, and through the Spirit of our God!

Ephesians 5:26-27

To make her holy, after purifying her by the Washing with the Water, according to his promise;

2 Thessalonians 1:4

So much is this the case that we ourselves speak with pride, before the Churches of God, of the patience and faith which you have shown, in spite of all the persecutions and troubles that you are enduring.

Hebrews 13:12

And so Jesus, also, to purify the People by his own blood, suffered outside the gate.

1 Peter 1:19

but by precious blood, as it were of a lamb, unblemished and spotless, the Blood of Christ.

Revelation 2:9

I know your persecution and your poverty--yet you are rich! I know, too, the slander that come from those who declare that they are Jews, though they are not, but are a Congregation of Satan.

Revelation 5:9

And they are singing a new song--'Thou art worthy to take the book and break its seals, for thou wast sacrificed, and with thy blood thou didst buy for God men of every tribe, and language, and people, and nation,

Revelation 6:9-11

When the Lamb opened the fifth seal, I saw under the altar the souls of those who had been killed for the sake of God's Message and for the testimony which they had borne.

Revelation 12:11

Their victory was due to the Blood of the Lamb, and to the Message to which they bore their testimony. In their love of life they shrank not from death.

Revelation 15:2

Then I saw what appeared to be a sea of glass mixed with fire; and, standing by this sea of glass, holding the harps of God, I saw those who had come victorious out of the conflict with the Beast and its image and the number that formed its name.

Revelation 17:6

And I saw the woman drunk with the blood of Christ's People and with the blood of the martyrs for Jesus. When I saw her, I was amazed beyond measure;

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 First-born from the dead, and the Ruler of all the Kings of the earth.' To him who loves us and freed us from our sins by his own blood--
John 13:8
"You shall never wash my feet!" exclaimed Peter. "Unless I wash you," answered Jesus, "you have nothing in common with me."
1 Corinthians 6:11
Such some of you used to be; but you washed yourselves clean. You became Christ's People! you were pronounced righteous through the Name of our Lord Jesus Christ, and through the Spirit of our God!
Ephesians 5:26
To make her holy, after purifying her by the Washing with the Water, according to his promise;
Hebrews 9:14
how much more will the blood of the Christ, who, through his eternal Spirit, offered himself up to God, as a victim without blemish, purify our consciences from a lifeless formality, and fit us for the service of the Living God!
1 John 1:7
But, if our lives are lived in the Light, as God himself is in the Light, we have communion with one another, and the Blood of Jesus, his Son, purifies us from all sin.

The blood

Revelation 5:9
And they are singing a new song--'Thou art worthy to take the book and break its seals, for thou wast sacrificed, and with thy blood thou didst buy for God men of every tribe, and language, and people, and nation,
Revelation 12:11
Their victory was due to the Blood of the Lamb, and to the Message to which they bore their testimony. In their love of life they shrank not from death.
Hebrews 13:12
And so Jesus, also, to purify the People by his own blood, suffered outside the gate.
1 Peter 1:19
but by precious blood, as it were of a lamb, unblemished and spotless, the Blood of Christ.

General references

Matthew 5:4
Blessed are the mourners, for they shall be comforted.