Sahih Muslim Book - 2, Hadith - 542

و حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ حَدَّثَنَا أَبِي عَنْ صَالِحٍ قَالَ ابْنُ شِهَابٍ وَلَكِنْ عُرْوَةُ يُحَدِّثُ عَنْ حُمْرَانَ أَنَّهُ قَالَ فَلَمَّا تَوَضَّأَ عُثْمَانُ قَالَ وَاللَّهِ لَأُحَدِّثَنَّكُمْ حَدِيثًا وَاللَّهِ لَوْلَا آيَةٌ فِي كِتَابِ اللَّهِ مَا حَدَّثْتُكُمُوهُ إِنِّي سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ لَا يَتَوَضَّأُ رَجُلٌ فَيُحْسِنُ وُضُوءَهُ ثُمَّ يُصَلِّي الصَّلَاةَ إِلَّا غُفِرَ لَهُ مَا بَيْنَهُ وَبَيْنَ الصَّلَاةِ الَّتِي تَلِيهَا. قَالَ عُرْوَةُ الْآيَةُ { إِنَّ الَّذِينَ يَكْتُمُونَ مَا أَنْزَلْنَا مِنْ الْبَيِّنَاتِ وَالْهُدَى إِلَى قَوْلِهِ: {اللَّاعِنُونَ}

It was narrated that Humran said: "When 'Uthman performed Wudu' he said: 'By Allah, I am going to tell you a Hadith which, by Allah, were it not for a Verse in the Book of Allah, I would not tell it to you. I heard the Messenger of Allah (s.a.w) say: "No man performs Wudu ' and does it well, then performs Salat, but he will be forgiven for whatever (sins) come between that and the Salat which follows it."