Abu Dawud
General Behavior
Book Number: 036 / Hadith Number: 5145
Narated By Abdullah ibn Umar : A man came to the Prophet (pbuh) and asked: Apostle 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.