Narrated by:Abu Haiyah said
It was narrated that Abu Haiyah said:"I saw 'Ali performing ablution and he washed his feet up to the ankles, then he said: 'I wanted to show you how your Prophet purified himself.'"
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي حَيَّةَ، قَالَ رَأَيْتُ عَلِيًّا تَوَضَّأَ فَغَسَلَ قَدَمَيْهِ إِلَى الْكَعْبَيْنِ ثُمَّ قَالَ أَرَدْتُ أَنْ أُرِيَكُمْ طُهُورَ نَبِيِّكُمْ ـ صلى الله عليه وسلم ـ .
IbnMaja
The Book of Purification and its Sunnah • Hadith 456