John 20:21-23 King James Version
21 Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.
22 And when he had said this, he breathed on them, and saith unto them, Receive ye the Holy Ghost:
23 Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained.
Uh; it appears you tried to slip something UNBIBLICAL into what you referenced.
That's one of the numerous errors of the Catholic Douay/Rheims Bible. They use the words "do penance" when Scripture says "repent".