Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ibnmajah:456Abū Bakr b. Abū Shaybah > Abū al-Aḥwaṣ > Abū Isḥāq > Abū Ḥayyah > Raʾayt ʿAlī Tawaḍḍaʾ Faghasal Qadamayh > al-Kaʿbayn Thum > Aradt

"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.'"  

ابن ماجة:٤٥٦حَدَّثَنَا 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 ﷺ