حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا رَبِيعَةُ الْكِنَانِيُّ، عَنِ الْمِنْهَالِ بْنِ عَمْرٍو، عَنْ زِرِّ بْنِ حُبَيْشٍ، أَنَّهُ سَمِعَ عَلِيًّا، رضى الله عنه وَسُئِلَ عَنْ وُضُوءِ، رَسُولِ اللَّهِ صلى الله عليه وسلم فَذَكَرَ الْحَدِيثَ وَقَالَ وَمَسَحَ عَلَى رَأْسِهِ حَتَّى لَمَّا يَقْطُرْ وَغَسَلَ رِجْلَيْهِ ثَلاَثًا ثَلاَثًا ثُمَّ قَالَ هَكَذَا كَانَ وُضُوءُ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏

Zirr b. Hubaish said that the heard that ‘ Ali was asked how the Messenger of Allah (PBUH) used to perform ablution. He then narrated the tradition and said: he wiped his head so much so that drops (of water) were about to trickle down. He then washed his feet three times and said: This is how the Messenger of Allah (PBUH) performed ablutions. Translation Not Available

Book Ref: Sunan Abi Dawud Book 1 Hadith 114
Web Ref:  Sunan Abi Dawud Book 1 Hadith 114