(4) باب مَنْ أَفَاضَ عَلَى رَأْسِهِ ثَلاَثًا
Narrated Jubair bin Mut`im:
Allah's Messenger (ﷺ) said, "As for me, I pour water three times on my head." And he pointed with both his hands.
Reference: Sahih al-Bukhari 254
In-book reference: Book 5, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 5, Hadith 254