1 John 1:9

If we confess our sins, he is faithful and righteous that he may forgive us our sins, and cleanse us from all unrighteousness.

1 John 1:7

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

Titus 2:14

who gave himself for us, that he might redeem us from all iniquity, and purify to himself a peculiar people, zealous of good works.

Romans 3:26

in the forbearance of God; unto the manifestation of his righteousness at the present time, so that he is just, and justifying him who is of the faith of Jesus.

1 Corinthians 6:11

And such were some of you: but you have washed, but you have been sanctified, but you have been justified in the name of the Lord Jesus Christ, and by the Spirit of our God.

Matthew 3:6

and were being baptized by him in the river Jordan, confessing their sins.

Mark 1:5

And all the Judean country and the Jerusalemites were going out unto him, and were being baptized by him in the river Jordan, confessing their sins.

Acts 19:18

and many of those having believed came, confessing, and renouncing their practices.

1 Corinthians 1:9

God is faithful, through whom you have been called unto the fellowship of His Son our Lord Jesus Christ.

Ephesians 5:26

in order that he might sanctify her, having purified her by the washing of water through the word,

1 Timothy 1:15

It is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief:

Hebrews 6:10

For God is not unrighteous to forget your work and the divine love which you manifested in his name, having ministered to the saints, and ministering.

Hebrews 10:23

and washed as to our body with purifying water: let us hold fast the testimony of hope steadfast; for the one having promised is faithful;

Hebrews 11:11

And by faith Sarah herself received power unto the conception of seed, even past the time of age, since she considered him faithful who had promised.

Revelation 15:3

And they are singing the song of Moses the servant of God, and the song of the Lamb, saying, Great and wonderful are thy works, O Lord God Omnipotent; true and righteous are thy ways, thou King of the nations:

Treasury of Scripture Knowledge

Summary

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.

General references

Bible References

We confess

Matthew 3:6
and were being baptized by him in the river Jordan, confessing their sins.
Mark 1:5
And all the Judean country and the Jerusalemites were going out unto him, and were being baptized by him in the river Jordan, confessing their sins.
Acts 19:18
and many of those having believed came, confessing, and renouncing their practices.

He is

1 Corinthians 1:9
God is faithful, through whom you have been called unto the fellowship of His Son our Lord Jesus Christ.
1 Timothy 1:15
It is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief:
Hebrews 10:23
and washed as to our body with purifying water: let us hold fast the testimony of hope steadfast; for the one having promised is faithful;
Hebrews 11:11
And by faith Sarah herself received power unto the conception of seed, even past the time of age, since she considered him faithful who had promised.

Just

Romans 3:26
in the forbearance of God; unto the manifestation of his righteousness at the present time, so that he is just, and justifying him who is of the faith of Jesus.
Hebrews 6:10
For God is not unrighteous to forget your work and the divine love which you manifested in his name, having ministered to the saints, and ministering.
Revelation 15:3
And they are singing the song of Moses the servant of God, and the song of the Lamb, saying, Great and wonderful are thy works, O Lord God Omnipotent; true and righteous are thy ways, thou King of the nations:

And to

1 John 1:7
but if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
1 Corinthians 6:11
And such were some of you: but you have washed, but you have been sanctified, but you have been justified in the name of the Lord Jesus Christ, and by the Spirit of our God.
Ephesians 5:26
in order that he might sanctify her, having purified her by the washing of water through the word,
Titus 2:14
who gave himself for us, that he might redeem us from all iniquity, and purify to himself a peculiar people, zealous of good works.

General references

1 Corinthians 11:31
But if we judged ourselves, we would not be judged:
Hebrews 8:12
Because I will be merciful unto their iniquities, and I will remember their sins no more.