John 20:23

If you remit any one's sins, they have been remitted; and, if you retain them, they have been retained."

Matthew 16:19

I will give you the keys of the Kingdom of Heaven. Whatever you forbid on earth will be held in Heaven to be forbidden, and whatever you allow on earth will be held in Heaven to be allowed."

Matthew 18:18

I tell you, all that you forbid on earth will be held in Heaven to be forbidden, and all that you allow on earth will be held in Heaven to be allowed.

Mark 2:5-10

When Jesus saw their faith, he said to the man: "Child, your sins are forgiven."

1 Corinthians 5:4

I have decided-having been present in spirit at your meetings, when the power of the Lord Jesus was with us-

Acts 2:38

"Repent," answered Peter, "and be baptized every one of you in the Faith of Jesus Christ for the forgiveness of your sins; and then you will receive the gift of the Holy Spirit.

Acts 10:43

To him it is that all the Prophets bear witness, when they say that every one who believes in him receives through his Name forgiveness of sins."

Acts 13:38-39

I would, therefore, have you know, brothers, that through Jesus forgiveness of sins is being proclaimed to you,

2 Corinthians 2:6-10

The man to whom I refer has been sufficiently punished by the penalty inflicted by the majority of you;

Ephesians 2:20

You have been built up upon the foundation laid by the Apostles and Prophets, Christ Jesus himself being 'the corner- stone.'

1 Timothy 1:20

Hymenaeus and Alexander are instances--the men whom I delivered over to 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
I will give you the keys of the Kingdom of Heaven. Whatever you forbid on earth will be held in Heaven to be forbidden, and whatever you allow on earth will be held in Heaven to be allowed."
Matthew 18:18
I tell you, all that you forbid on earth will be held in Heaven to be forbidden, and all that you allow on earth will be held in Heaven to be allowed.
Mark 2:5
When Jesus saw their faith, he said to the man: "Child, your sins are forgiven."
Acts 2:38
"Repent," answered Peter, "and be baptized every one of you in the Faith of Jesus Christ for the forgiveness of your sins; and then you will receive the gift of the Holy Spirit.
Acts 10:43
To him it is that all the Prophets bear witness, when they say that every one who believes in him receives through his Name forgiveness of sins."
Acts 13:38
I would, therefore, have you know, brothers, that through Jesus forgiveness of sins is being proclaimed to you,
1 Corinthians 5:4
I have decided-having been present in spirit at your meetings, when the power of the Lord Jesus was with us-
2 Corinthians 2:6
The man to whom I refer has been sufficiently punished by the penalty inflicted by the majority of you;
Ephesians 2:20
You have been built up upon the foundation laid by the Apostles and Prophets, Christ Jesus himself being 'the corner- stone.'
1 Timothy 1:20
Hymenaeus and Alexander are instances--the men whom I delivered over to Satan, that they might be taught not to blaspheme.