Mukhtasar Bukhari (Abridged) 1118 — If the oppressed forgives, must

Narrated Abu Huraira (may Allah be pleased with him): The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever has wronged his brother concerning his honor or anything else, he should seek his forgiveness today, before there will be neither dinar nor dirham (i.e., before the Day of Resurrection). If he has any good deeds, they will be taken from him in proportion to his wrongdoing, and if he has no good deeds, the sins of the wronged person will be loaded onto him." (We seek refuge with Allah from that.)