John 20:23

unto those whose sins ye release, they shall be released; and unto those whose sins ye retain, they shall be retained.

Matthew 16:19

And I will give unto thee the keys of the kingdom of the heavens, and whatever thou shalt bind on the earth shall be bound in the heavens, and whatever thou shalt loose on the earth shall be loosed in the heaven.

Matthew 18:18

Verily I say unto you, Whatever ye shall bind on earth shall be bound in the heaven; and whatever ye shall loose on earth shall be loosed in the heaven.

Mark 2:5-10

When Jesus saw their faith, he said unto the paralytic, 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 our Lord Jesus Christ,

Acts 2:38

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

Acts 10:43

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

Acts 13:38-39

Be it known unto you, therefore, men and brethren, that through this one is preached unto you the remission of sins;

2 Corinthians 2:6-10

Sufficient to such a one is this reprehension, 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 thee the keys of the kingdom of the heavens, and whatever thou shalt bind on the earth shall be bound in the heavens, and whatever thou shalt loose on the earth shall be loosed in the heaven.
Matthew 18:18
Verily I say unto you, Whatever ye shall bind on earth shall be bound in the heaven; and whatever ye shall loose on earth shall be loosed in the heaven.
Mark 2:5
When Jesus saw their faith, he said unto the paralytic, Son, thy sins are forgiven thee.
Acts 2:38
Then Peter said unto them, Repent and be baptized each one of you into the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Spirit.
Acts 10:43
Unto him all the prophets give witness, that whosoever believes in him shall receive remission of sins through his name.
Acts 13:38
Be it known unto you, therefore, men and brethren, that through this one is preached unto you the remission 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 our Lord Jesus Christ,
2 Corinthians 2:6
Sufficient to such a one is this reprehension, 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.