I heard ‘Ali say: If I heard a hadeeth from the Messenger of Allah ﷺ, Allah benefitted me as He willed thereby. If someone else told me something from him I would ask him to swear, and if he swore I would believe him. Abu Bakr told me - and Abu Bakr told the truth - that he heard the Prophet ﷺ say: ʿThere is no believer who commits a sin, then does wudooʿ and does it well and prays two rak'ahs and asks Allah, may He be glorified and exalted, for forgiveness but Allah will forgive him.ʿ Then he recited the verse: ʿAnd those who, when they have committed Fahishah (illegal sexual intercourse) or wronged themselves...ʿ (Al ‘Imran 3:135). (Using translation from Aḥmad 56)
سَمِعْتُ مِنْ رَسُولِ اللهِ ﷺ حَدِيثًا نَفَعَنِي اللهُ بِمَا شَاءَ أَنْ يَنْفَعَنِي وَإِذَا حَدَّثَنِي رَجُلٌ مِنْ أَصْحَابِهِ اسْتَحْلَفْتُهُ فَإِذَا حَلَفَ لِي صَدَّقْتُهُ وَإِنَّهُ حَدَّثَنِي أَبُو بَكْرٍ وَصَدَقَ أَبُو بَكْرٍ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَا مِنْ رَجُلٍ مُؤْمِنٍ يُذْنِبُ ذَنْبًا ثُمَّ يَقُومُ فَيَتَطَهَّرُ فَيُحْسِنُ الطُّهُورَ ثُمَّ يَسْتَغْفِرُ اللهَ إِلَّا غَفَرَ اللهُ لَهُ» ثُمَّ قَرَأَ الْآيَةَ {وَالَّذِينَ إِذَا فَعَلُوا فَاحِشَةً أَوْ ظَلَمُوا أَنْفُسَهُمُ} [آل عمران 135] إِلَى آخِرِ الْآيَةِ