John 20:23

Whosoever's sins you remit, they are remitted unto them; and whosoever's sins you retain, they are retained.

Matthew 16:19

And I will give unto you the keys of the kingdom of heaven: and whatsoever you shall bind on earth shall be bound in heaven: and whatsoever you shall loose on earth shall be loosed in heaven.

Matthew 18:18

Verily I say unto you, whatsoever you shall bind on earth shall be bound in heaven: and whatsoever you shall loose on earth shall be loosed in heaven.

Mark 2:5-10

When Jesus saw their faith, he said unto the paralytic, Son, your sins be forgiven you.

1 Corinthians 5:4

In the name of our Lord Jesus Christ, when you are gathered together, and my spirit, with the power of our Lord Jesus Christ,

Acts 2:38

Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and you shall receive the gift of the Holy Spirit.

Acts 10:43

To him give all the prophets witness, that through his name whosoever believes in him shall receive remission of sins.

Acts 13:38-39

Be it known unto you therefore, men and brethren, that through this man is preached unto you the forgiveness of sins:

2 Corinthians 2:6-10

Sufficient to such a man is this punishment, which was inflicted of many.

Ephesians 2:20

And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief cornerstone;

1 Timothy 1:20

Of whom is Hymenaeus and Alexander; whom I have delivered unto Satan, that they may learn not to blaspheme.

Treasury of Scripture Knowledge

Summary

Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained.

Bible References

General references

Matthew 16:19
And I will give unto you the keys of the kingdom of heaven: and whatsoever you shall bind on earth shall be bound in heaven: and whatsoever you shall loose on earth shall be loosed in heaven.
Matthew 18:18
Verily I say unto you, whatsoever you shall bind on earth shall be bound in heaven: and whatsoever you shall loose on earth shall be loosed in heaven.
Mark 2:5
When Jesus saw their faith, he said unto the paralytic, Son, your sins be forgiven you.
Acts 2:38
Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and you shall receive the gift of the Holy Spirit.
Acts 10:43
To him give all the prophets witness, that through his name whosoever believes in him shall receive remission of sins.
Acts 13:38
Be it known unto you therefore, men and brethren, that through this man is preached unto you the forgiveness of sins:
1 Corinthians 5:4
In the name of our Lord Jesus Christ, when you are gathered together, and my spirit, with the power of our Lord Jesus Christ,
2 Corinthians 2:6
Sufficient to such a man is this punishment, which was inflicted of many.
Ephesians 2:20
And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief cornerstone;
1 Timothy 1:20
Of whom is Hymenaeus and Alexander; whom I have delivered unto Satan, that they may learn not to blaspheme.