Chapter 12 — Part I: The Creed — Article X: The Forgiveness of Sins
Section 7. Furthermore, the exercise of this power is not restricted to particular times. Whenever the sinner turns from his evil ways he is not to be rejected, as we learn from the reply of our Saviour to the Prince of the Apostles. When St. Peter asked how often we should pardon an offending brother, whether seven times, Not only seven times, said the Redeemer, but till seventy times seven.