Sahih al-Bukhari 171
صحيح البخاري#171Sahihحَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحِيمِ، قَالَ أَخْبَرَنَا سَعِيدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا عَبَّادٌ، عَنِ ابْنِ عَوْنٍ، عَنِ ابْنِ سِيرِينَ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَمَّا حَلَقَ رَأْسَهُ كَانَ أَبُو طَلْحَةَ أَوَّلَ مَنْ أَخَذَ مِنْ شَعَرِهِ.
Narrated Anas:When Allah's Messenger (ﷺ) got his head shaved, Abu- Talha was the first to take some of his hair
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 4:37