Sahih Muslim Book - 2, Hadith - 544

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ وَأَحْمَدُ بْنُ عَبْدَةَ الضَّبِّيُّ قَالَا حَدَّثَنَا عَبْدُ الْعَزِيزِ وَهُوَ الدَّرَاوَرْدِيُّ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ حُمْرَانَ مَوْلَى عُثْمَانَ قَالَ أَتَيْتُ عُثْمَانَ بْنَ عَفَّانَ بِوَضُوءٍ فَتَوَضَّأَ ثُمَّ قَالَ إِنَّ نَاسًا يَتَحَدَّثُونَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَحَادِيثَ لَا أَدْرِي مَا هِيَ إِلَّا أَنِّي رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ تَوَضَّأَ مِثْلَ وُضُوئِي هَذَا ثُمَّ قَالَ مَنْ تَوَضَّأَ هَكَذَا غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ وَكَانَتْ صَلَاتُهُ وَمَشْيُهُ إِلَى الْمَسْجِدِ نَافِلَةً. وَفِي رِوَايَةِ ابْنِ عَبْدَةَ أَتَيْتُ عُثْمَانَ فَتَوَضَّأَ.

It was narrated that Humran, the freed slave of 'Uthman, said: "I brought water for Wudu' to 'Uthman bin 'Affan, and he performed Wudu', then he said: 'Some people narrate Ahadith from the Messenger of Allah (s.a.w), and I do not know what they are. But I saw the Messenger of Allah (s.a.w) performing Wudu' as I have just done it, then he said: "Whoever performs Wudu' in this manner will be forgiven for his previous sins, and his prayer and his walking to the Masjid will be Nafilah." In the narration of Ibn 'Abdah it is: "I came to 'Uthman and he performed Wudu'."