Sahih al-Bukhari 2974
صحيح البخاري#2974Sahihحَدَّثَنَا سَعِيدُ بْنُ أَبِي مَرْيَمَ، قَالَ حَدَّثَنِي اللَّيْثُ، قَالَ أَخْبَرَنِي عُقَيْلٌ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي ثَعْلَبَةُ بْنُ أَبِي مَالِكٍ الْقُرَظِيُّ، أَنَّ قَيْسَ بْنَ سَعْدٍ الأَنْصَارِيّ َ ـ رضى الله عنه ـ وَكَانَ صَاحِبَ لِوَاءِ رَسُولِ اللَّهِ صلى الله عليه وسلم أَرَادَ الْحَجَّ فَرَجَّلَ.
Narrated Tha`laba bin Abi Malik Al-Qurazi:When Qais bin Sa`d Al-Ansari, who used to carry the flag of the Prophet, intended to perform Hajj, he combed 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: 56:183