Fadayl bin 'Iyyad bin Mas'ud فضيل بن عياض بن مسعود · General Behavior (Kitab Al-Adab)

A man came to the Prophet (ﷺ) and asked: Messenger of Allah! how often shall I forgive a servant? He gave no reply, so the man repeated what he had said, but he still kept silence. When he asked a third time, he replied: Forgive him seventy times daily.