(33) باب الْمَاءِ الَّذِي يُغْسَلُ بِهِ شَعَرُ الإِنْسَانِ
Narrated Ibn Seereen:
I said to `Abida, "I have some of the hair of the Prophet (ﷺ) which I got from Anas or from his family." `Abida replied. "No doubt if I had a single hair of that it would have been dearer to me than the whole world and whatever is in it."
Reference: Sahih al-Bukhari 170
In-book reference: Book 4, Hadith 36
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 171