Sunan an-Nasa'i 5072
سنن النسائي#5072Sahihأَخْبَرَنَا عَلِيُّ بْنُ خَشْرَمٍ، قَالَ حَدَّثَنَا عِيسَى، - وَهُوَ ابْنُ يُونُسَ - عَنِ الأَوْزَاعِيِّ، عَنِ الزُّهْرِيِّ، عَنْ سُلَيْمَانَ، وَأَبِي، سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِنَّ الْيَهُودَ وَالنَّصَارَى لاَ تَصْبُغُ فَخَالِفُوهُمْ " .
It was narrated from Abu Hurairah that:The Prophet [SAW] said: "The Jews and Christians do not dye their hair, so be different from them
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:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 48:33