John 20:23

Whosoever's sins ye remit, they are remitted unto them: And whosoever's sins ye retain, they are retained."

Matthew 16:19

And I will give unto thee the keys of the kingdom of heaven, and whatsoever thou bindest upon earth, it shall be bound in heaven: and whatsoever thou loosest on earth, it shall be loosed in heaven."

Matthew 18:18

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

Mark 2:5-10

When Jesus saw their faith, he said to the sick of the palsy, "Son, thy sins are forgiven thee."

1 Corinthians 5:4

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

Acts 2:38

Peter said unto them, "Repent, and be baptised every one of of you in the name of Jesus Christ, for the remission of sins, and ye shall receive the gift of the holy ghost.

Acts 10:43

To him giveth all the prophets witness, that through his name all that believe in him shall receive remission of sins."

Acts 13:38-39

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

2 Corinthians 2:6-10

It is sufficient unto the same man that he was rebuked of many.

Ephesians 2:20

and are built upon the foundation of the apostles and prophets - Jesus Christ being the head cornerstone -

1 Timothy 1:20

Of whose number is Hymenaeus, and Alexander, which I have delivered unto Satan, that they might be taught 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 thee the keys of the kingdom of heaven, and whatsoever thou bindest upon earth, it shall be bound in heaven: and whatsoever thou loosest on earth, it shall be loosed in heaven."
Matthew 18:18
Verily I say unto you whatsoever ye bind on earth, shall be bound in heaven. And whatsoever ye loose on earth, shall be loosed in heaven.
Mark 2:5
When Jesus saw their faith, he said to the sick of the palsy, "Son, thy sins are forgiven thee."
Acts 2:38
Peter said unto them, "Repent, and be baptised every one of of you in the name of Jesus Christ, for the remission of sins, and ye shall receive the gift of the holy ghost.
Acts 10:43
To him giveth all the prophets witness, that through his name all that believe in him shall receive remission of sins."
Acts 13:38
Be it known unto you therefore, ye 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 ye are gathered together, and my spirit, with the power of the Lord Jesus Christ,
2 Corinthians 2:6
It is sufficient unto the same man that he was rebuked of many.
Ephesians 2:20
and are built upon the foundation of the apostles and prophets - Jesus Christ being the head cornerstone -
1 Timothy 1:20
Of whose number is Hymenaeus, and Alexander, which I have delivered unto Satan, that they might be taught not to blaspheme.