Sahih al-Bukhari 3462
صحيح البخاري#3462Sahihحَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنِي إِبْرَاهِيمُ بْنُ سَعْدٍ، عَنْ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، قَالَ قَالَ أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ إِنَّ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّ الْيَهُودَ وَالنَّصَارَى لاَ يَصْبُغُونَ، فَخَالِفُوهُمْ ".
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "The Jews and the Christians do not dye (their grey hair), so you shall do the opposite of what they do (i.e. dye your grey hair and beards)
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: 60:129