Ali wiped his head during ablution until water was about to drip from it and said, "This is how I saw the Messenger of Allah ﷺ perform ablution."
حدثنا مروان بن معاوية الفزاري حدثنا ربيعة بن عتبة الكناني عن المنهال بن عمرو
مسح علي رضي الله عنه رأسه في الوضوء حتى أراد أن يقطر وقال هكذا رأيت رسول الله ﷺ يتوضأ
Its isnad is sahih. Marwan bin Muawiya Fazari is a trustworthy hafiz. Rabia bin Utbah Kinani was deemed trustworthy by Ibn Main, Ajli, and others. Abu Dawud narrated the hadith, 11:42-43, at greater length.