(33) باب الْمَاءِ الَّذِي يُغْسَلُ بِهِ شَعَرُ الإِنْسَانِ
Narrated Anas:
When Allah's Messenger (ﷺ) got his head shaved, Abu- Talha was the first to take some of his hair.
Reference: Sahih al-Bukhari 171
In-book reference: Book 4, Hadith 37
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 172