Other New Testament scriptures bear witness that
the Apostolic Church acknowledged the use of the power
to forgive sins.
Acts 2:38
Peter (said) to them, "Repent and be baptized, every
one of you, in the name of Jesus Christ for the forgiveness
of your sins; and you will receive the gift of the holy Spirit."
 
1 John 1:9
If we acknowledge our sins, he is faithful and just and
will forgive our sins and cleanse us from every wrongdoing.
 
1 John 2:12
I am writing to you, children, because your sins have
been forgiven for his name's sake.