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.

It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him), he says that the Messenger of Allah (peace and blessings of Allah be upon him) said: "A man will be brought on the Day of Resurrection and it will be said: Present to him his minor sins, so they will be presented to him, and his major sins will be concealed. And (to make him confess) it will be said to him: Did you commit such and such sin on such and such day? (In response) he will confess and will not deny, but he will be afraid of his major sins (being presented). (Then) it will be said: For every sin of his, grant him a good deed." The Prophet (peace and blessings of Allah be upon him) said: "(Seeing this state of Divine mercy) that servant will say: I had some other sins as well, which I do not see here." Abu Dharr (may Allah be pleased with him) said: I saw the Messenger of Allah (peace and blessings of Allah be upon him) laughing so much (after saying this) that his molar teeth became visible.

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, who says that the Messenger of Allah, peace and blessings be upon him, said: "Many people will wish that they had brought more sins." The companions asked: O Messenger of Allah! Why is that? He, peace and blessings be upon him, said: "These will be the people whose sins Allah, the Exalted, will turn into good deeds."