A man was publicly berating his servant for repeatedly committing the same mistake. Upon seeing such a scene, the Messenger [saws] advised the man to be patient and forgive his servant.
The man asked: “I have forgiven him so many times already! How often should I forgive him?!”
The Messenger replied: “As often as you wish God to forgive you.”
(Makes the Mariana trench look like a mere paper cut, eh.)