Hadith 6:88
Muhammad ibn Fudayl narrated to us, from Yazid, from Abdullah ibn al-Harith, who said: Ali washed the Prophet, may Allah bless him and grant him peace, while the Prophet, may Allah bless him and grant him peace, had his shirt on. And upon Ali’s hand was a rag with which he was washing him. He would insert his hand under the shirt and wash him, while the shirt was upon him.
حدثنا محمد بن فضيل عن يزيد عن عبد الله بن الحارث قال غسل النبي صلى الله عليه وسلم علي وعلى النبي صلى الله عليه وسلم قميصه وعلى يد علي خرقة يغسله بها يدخل يده تحت القميص فيغسله والقميص عليه