1 John 1:9

If we confess our sins, He is faithful and righteous to forgive us our sins, and to 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 for Himself a special people, zealous of good works.

Romans 3:26

for the manifestation of His righteousness in the present time, to the end that He may be righteous, even when declaring righteous him who has faith in Jesus.

1 Corinthians 6:11

And such were some of you; but ye were washed, but ye were sanctified, but ye were justified in the name of the Lord Jesus, and in the Spirit of our God.

Matthew 3:6

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

Mark 1:5

And there went out to him all the country of Judea and all those of Jerusalem, and were being immersed by him in the river Jordan, confessing their sins.

Acts 19:18

Many also of those who had believed were coming, confessing, and declaring their practices.

1 Corinthians 1:9

God is faithful, through Whom ye were called into the fellowship of His Son, Jesus Christ our Lord.

Ephesians 5:26

that He might sanctify it, having cleansed it by the washing of the water in the word,

1 Timothy 1:15

Faithful is the saying, and worthy of all acceptance, 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 love which ye showed toward His name, in having ministered to the saints, and still ministering.

Hebrews 10:23

let us hold fast the confession of the hope without wavering (for faithful is He Who promised);

Hebrews 11:11

By faith Sarah herself also received power to conceive seed, even when past the age of child-bearing, since she accounted Him faithful, Who promised.

Revelation 15:3

And they sang the song of Moses, the servant of God, and the song of the Lamb, saying, "Great and marvelous are Thy works, O Lord God, the Almighty; righteous and true are Thy ways, Thou King of the ages.

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 they were being immersed by him in the river Jordan, confessing their sins.
Mark 1:5
And there went out to him all the country of Judea and all those of Jerusalem, and were being immersed by him in the river Jordan, confessing their sins.
Acts 19:18
Many also of those who had believed were coming, confessing, and declaring their practices.

He is

1 Corinthians 1:9
God is faithful, through Whom ye were called into the fellowship of His Son, Jesus Christ our Lord.
1 Timothy 1:15
Faithful is the saying, and worthy of all acceptance, that Christ Jesus came into the world to save sinners; of whom I am chief;
Hebrews 10:23
let us hold fast the confession of the hope without wavering (for faithful is He Who promised);
Hebrews 11:11
By faith Sarah herself also received power to conceive seed, even when past the age of child-bearing, since she accounted Him faithful, Who promised.

Just

Romans 3:26
for the manifestation of His righteousness in the present time, to the end that He may be righteous, even when declaring righteous him who has faith in Jesus.
Hebrews 6:10
for God is not unrighteous to forget your work, and the love which ye showed toward His name, in having ministered to the saints, and still ministering.
Revelation 15:3
And they sang the song of Moses, the servant of God, and the song of the Lamb, saying, "Great and marvelous are Thy works, O Lord God, the Almighty; righteous and true are Thy ways, Thou King of the ages.

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 ye were washed, but ye were sanctified, but ye were justified 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 washing of the water in the word,
Titus 2:14
who gave Himself for us, that he might redeem us from all iniquity, and purify for Himself a special people, zealous of good works.

General references

1 Corinthians 11:31
But, if we discerned ourselves, we would not be judged;
Hebrews 8:12
because I will be merciful to their unrighteousness, and I will remember their sins no more."