Musnad Ahmad #46

Ali said: If Heard something from the Messenger of Allah (ﷺ), Allah would benefit me thereby as He willed. Abu Bakr told me - and Abu Bakr spoke the truth - he said: The Messenger of Allah (ﷺ) said: `There is no Muslim who commits a sin then does wudu' and prays two rak'ahs then asks Allah for forgiveness for that sin, but He will forgive him.” And he recited these two verses: `And whoever does evil or wrongs himself but afterwards seeks Allah's forgiveness, he will find Allah Oft-Forgiving Most Merciful` “And those who, when they have committed Fahishah (illegal sexual intercourse) or wronged themselves with evil, remember Allah and ask forgiveness for their sins;-and none can forgive sins but Allah - and do not persist in what (wrong) they have done, while they know` Shu'bah said: I heard 'Uthman from the family of Abu 'Aqeel athThaqafi say--but he said. Shu'bah said: And he recited one of these two verses: `whosoever works evil, will have the recompense thereof` or “And those who, when they have committed Fahishah (illegal sexual intercourse)...` [Al 'Imran 3:135).