Musnad Ahmad

Sayyiduna Ali (may Allah honor his face) says that whenever I heard a hadith from the Prophet (peace and blessings be upon him), Allah would benefit me from it as He willed. Sayyiduna Abu Bakr Siddiq (may Allah be pleased with him) narrated this hadith to me, and he is truthful in narrating this hadith, that the Messenger of Allah (peace and blessings be upon him) said: "If any Muslim commits a sin, then performs ablution, then offers two units of prayer, and seeks forgiveness from Allah for that sin, Allah will surely forgive his sin." After that, the Prophet (peace and blessings be upon him) recited these two verses: «وَمَن يَعْمَلْ سُوءًا أَوْ يَظْلِمْ نَفْسَهُ ثُمَّ يَسْتَغْفِرِ اللَّـهَ يَجِدِ اللَّـهَ غَفُورًا رَّحِيمًا» [4-النساء:110] "Whoever commits a sin or wrongs himself, then seeks forgiveness from Allah, he will find Allah Most Forgiving, Most Merciful." And «وَالَّذِينَ إِذَا فَعَلُوا فَاحِشَةً أَوْ ظَلَمُوا أَنفُسَهُمْ ذَكَرُوا اللَّـهَ فَاسْتَغْفَرُوا لِذُنُوبِهِمْ وَمَن يَغْفِرُ الذُّنُوبَ إِلَّا اللَّـهُ وَلَمْ يُصِرُّوا عَلَىٰ مَا فَعَلُوا وَهُمْ يَعْلَمُونَ» [3-آل عمران:135] "Those who, when they commit a sin or wrong themselves . . . ."