Musnad Ahmad 1350
It was narrated that Abu Hayyah al-Wadi`i said:
I saw ‘Ali (رضي الله عنه) urinate in ar-Rahbah, then he called for water and did wudoo’. He washed his hands three times, rinsed his mouth and nose three times, washed his face three times, washed his forearms three times each, wiped his head and washed his feet three times each. Then he said: I saw the Messenger of Allah (ﷺ) do as you have seen me do.
حَدَّثَنَا عَبْد اللَّهِ، حَدَّثَنَا إِسْحَاقُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي حَيَّةَ الْوَادِعِيِّ، قَالَ رَأَيْتُ عَلِيًّا رَضِيَ اللَّهُ عَنْهُ بَالَ فِي الرَّحَبَةِ ثُمَّ دَعَا بِمَاءٍ فَتَوَضَّأَ فَغَسَلَ كَفَّيْهِ ثَلَاثًا وَتَمَضْمَضَ وَاسْتَنْشَقَ ثَلَاثًا وَغَسَلَ وَجْهَهُ ثَلَاثًا وَغَسَلَ ذِرَاعَيْهِ ثَلَاثًا ثَلَاثًا وَمَسَحَ بِرَأْسِهِ وَغَسَلَ قَدَمَيْهِ ثَلَاثًا ثَلَاثًا ثُمَّ قَالَ رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَعَلَ كَالَّذِي رَأَيْتُمُونِي فَعَلْتُ‏.‏