Give me one instance where any Apostle ever forgave sin.

The Catholic Answers

St. Paul certainly exercised the power of binding and loosing from sin and the effects of sin in the case of the incestuous Corinthian. In 1 Cor. V., 3, we find him saying, “I have already judged him that hath done so”; and in 2 Cor. II., 10, he justifies his forgiveness of the repentant man by saying, “If I have pardoned anything, I have done it in the person of Christ.”

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty