Abdullah bin Abbas reported,

Ali, meaning Ibn Abu Talib, came in to me after he had relieved himself and called for water for ablution. We brought him a vessel containing water and placed it before him.He said, "Ibn Abbas, shall I show you how the Messenger of Allah ﷺ used to perform ablution?"I replied, "Yes, please."He tilted the vessel over his hand and washed it, then he put his right hand in and poured water with it onto the other, then he washed both palms. He rinsed his mouth and sniffed water into his nose and blew it out. Then he placed both hands together into the vessel, took a handful of water, and threw it onto his face. He inserted his thumbs into the front of his ears, then did so a second time, then a third in the same manner. Then he took a handful of water with his right palm and poured it onto the front of his head, letting it run down over his face. Then he washed his forearms up to the elbows three times each. Then he wiped his head and the backs of his ears. Then he put both hands in together, took a handful of water, and threw it onto his foot, which still had the sandal on, and rubbed the foot with it. He did the same with the other foot.I asked, "Even with the sandals on?"He said, "Even with the sandals on."I asked again, "Even with the sandals on?"He said, "Even with the sandals on."I asked once more, "Even with the sandals on?"He said, "Even with the sandals on."

حدثنا عبد العزيز بن يحيى الحراني حدثنا محمد يعني ابن سلمة عن محمد بن إسحق عن محمد بن طلحة بن يزيد بن ركانة عن عبيد الله الخولاني

عن ابن عباس قال

دخل علي علي يعني ابن أبي طالب وقد أهراق الماء فدعا بوضوء فأتيناه بتور فيه ماء حتى وضعناه بين يديه فقال يا ابن عباس ألا أريك كيف كان يتوضأ رسول الله ﷺ قلت بلى قال فأصغى الإناء على يده فغسلها ثم أدخل يده اليمنى فأفرغ بها على الأخرى ثم غسل كفيه ثم تمضمض واستنثر ثم أدخل يديه في الإناء جميعا فأخذ بهما حفنة من ماء فضرب بها على وجهه ثم ألقم إبهاميه ما أقبل من أذنيه ثم الثانية ثم الثالثة مثل ذلك ثم أخذ بكفه اليمنى قبضة من ماء فصبها على ناصيته فتركها تستن على وجهه ثم غسل ذراعيه إلى المرفقين ثلاثا ثلاثا ثم مسح رأسه وظهور أذنيه ثم أدخل يديه جميعا فأخذ حفنة من ماء فضرب بها على رجله وفيها النعل ففتلها بها ثم الأخرى مثل ذلك قال قلت وفي النعلين قال وفي النعلين قال قلت وفي النعلين قال وفي النعلين قال قلت وفي النعلين قال وفي النعلين