Sahih Muslim Book - 2, Hadith - 546

حَدَّثَنَا أَبُو كُرَيْبٍ مُحَمَّدُ بْنُ الْعَلَاءِ وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ جَمِيعًا عَنْ وَكِيعٍ قَالَ أَبُو كُرَيْبٍ حَدَّثَنَا وَكِيعٌ عَنْ مِسْعَرٍ عَنْ جَامِعِ بْنِ شَدَّادٍ أَبِي صَخْرَةَ قَالَ سَمِعْتُ حُمْرَانَ بْنَ أَبَانَ قَالَ كُنْتُ أَضَعُ لِعُثْمَانَ طَهُورَهُ فَمَا أَتَى عَلَيْهِ يَوْمٌ إِلَّا وَهُوَ يُفِيضُ عَلَيْهِ نُطْفَةً وَقَالَ عُثْمَانُ حَدَّثَنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عِنْدَ انْصِرَافِنَا مِنْ صَلَاتِنَا هَذِهِ قَالَ مِسْعَرٌ أُرَاهَا الْعَصْرَ فَقَالَ مَا أَدْرِي أُحَدِّثُكُمْ بِشَيْءٍ أَوْ أَسْكُتُ فَقُلْنَا يَا رَسُولَ اللَّهِ إِنْ كَانَ خَيْرًا فَحَدِّثْنَا وَإِنْ كَانَ غَيْرَ ذَلِكَ فَاللَّهُ وَرَسُولُهُ أَعْلَمُ قَالَ مَا مِنْ مُسْلِمٍ يَتَطَهَّرُ فَيُتِمُّ الطُّهُورَ الَّذِي كَتَبَ اللَّهُ عَلَيْهِ فَيُصَلِّي هَذِهِ الصَّلَوَاتِ الْخَمْسَ إِلَّا كَانَتْ كَفَّارَاتٍ لِمَا بَيْنَهَا.

It was narrated that Jami' bin Shaddad Abu Sakhrah said: "I heard Humran bin Aban say: 'I used to bring (water for) purification to 'Uthman, and there was no day when he did not bathe with a small amount of water. 'Uthman said: "The Messenger of Allah (s.a.w) told us when we were returning from this prayer - Mi'sar said: "I think it was 'Asr" - "I do not know, should I tell you about something, or not?" We said: "O Messenger of Allah, if it is good, then tell us, and if it is not, then Allah and His Messenger know best." He said: "There is no Muslim who purifies himself and does so properly in the manner enjoined by Allah, then offers these five prayers, but they will be an expiation for whatever (of sin) comes in between."