حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ وَرْدَانَ، حَدَّثَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ، حَدَّثَنِي حُمْرَانُ، قَالَ رَأَيْتُ عُثْمَانَ بْنَ عَفَّانَ تَوَضَّأَ ‏.‏ فَذَكَرَ نَحْوَهُ وَلَمْ يَذْكُرِ الْمَضْمَضَةَ وَالاِسْتِنْشَاقَ وَقَالَ فِيهِ وَمَسَحَ رَأْسَهُ ثَلاَثًا ثُمَّ غَسَلَ رِجْلَيْهِ ثَلاَثًا ثُمَّ قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم تَوَضَّأَ هَكَذَا وَقَالَ ‏"‏ مَنْ تَوَضَّأَ دُونَ هَذَا كَفَاهُ ‏"‏ ‏.‏ وَلَمْ يَذْكُرْ أَمْرَ الصَّلاَةِ ‏.‏

Humran said : I saw ‘Uthman b. ‘Affan performing ablution. He then narrated the same tradition. In this version there is no mention of rinsing the mouth and snuffing up water. This traditions adds : “He wiped his head three times. He then washed his feet three times. He then said : I saw the Messenger of Allah (PBUH) performing ablution in like manner. He (the Prophet) said: He who performs ablution less than this, it is sufficient for him. 73 The narrator did not mention prayer (in this version). Translation Not Available

Book Ref: Sunan Abi Dawud Book 1 Hadith 107
Web Ref:  Sunan Abi Dawud Book 1 Hadith 107