Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Tawil Shatb Mamdood (may Allah be pleased with him) that he came to the Messenger of Allah (peace and blessings be upon him) and said: What do you think about a man who has committed all sins and has left no sin uncommitted, and in this regard, he has fulfilled every small and big (evil) need and desire of his? Is there any repentance for such a person? The Prophet (peace and blessings be upon him) said: "Have you become a Muslim?" He said: Indeed, I bear witness that there is no deity except Allah, He is alone, He has no partner, and indeed you are the Messenger of Allah. The Prophet (peace and blessings be upon him) said: Yes, (the repentance of such a person can be accepted, but the point is that) you should continue to do righteous deeds and abandon evil deeds, Allah Almighty will turn all your sins into good deeds." He said: Will all my deceptions and all my immoralities (also be turned into good deeds)? The Prophet (peace and blessings be upon him) said: "Yes." He said: Allahu Akbar (Allah is the Greatest), and then he kept saying Allahu Akbar until he disappeared.