185.He who has done a wrong affecting his brother's honour, or anything else, must ask for his forgiveness for it now before he will have neither dinar or dirham. If he has any good deed to his credit it would be out of his credit that the measure of his wrongdoing would be deducted, but if he has done no good deeds it will be taken from the other's evil deeds and laid upon him.
(Bukhari).
(Sayings of Muhammad (pbuh). by Prof. Ghazi Ahmad).