Abu Sa’id al-Khudri reported: The Messenger of Allah, peace and blessings be upon him, said, “The five prayers expiate the sins between them. You see that if there were five rivers between a working man’s house and his place of work, he would depart for work as much as Allah willed and he would be covered in dirt or grime. Every time he passed by a river it would cleanse him from that filth. Likewise, each time he commits a sin or as much as Allah willed, then he prayed for forgiveness, he would be forgiven just as he had been before it.”
Source: al-Mu’jam al-Kabīr 5444
Grade: Sahih li ghayrihi (authentic due to external evidence) according to Al-Albani
عَنْ أَبِي سَعِيدٍ قَالَ قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ الصَّلَوَاتُ الْخَمْسُ كَفَّارَاتُ مَا بَيْنَهُمَا أَرَأَيْتَ لَوْ أَنَّ رَجُلًا كَانَ لَهُ مُعْتَمَلٌ بَيْنَ مَنْزِلِهِ ومُعْتَمَلِهِ خَمْسَةُ أَنْهَارٍ فَإِذَا انْطَلَقَ إِلَى مُعْتَمَلِهِ عَمِلَ مَا شَاءَ اللهُ فَأَصَابَهُ الْوَسَخُ أَوِ الْعَرَقُ فَكُلَّمَا مَرَّ بِنَهَرٍ اغْتَسَلَ مَا كَانَ ذَلِكَ مُنَقِّيًا مِنْ دَرَنِهِ فَكَذَلِكَ الصَّلَوَاتُ كُلَّمَا عَمِلَ خَطِيئَةً أَوْ مَا شَاءَ اللهُ ثُمَّ صَلَّى صَلَاةً اسْتَغْفَرَ غُفِرَ لَهُ مَا كَانَ قَبْلَهَا
5444 المعجم الكبير للطبراني
355 المحدث الألباني خلاصة حكم المحدث صحيح لغيره في صحيح الترغيب