Sunan an-Nasa'i 5083
سنن النسائي#5083Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ، عَنْ سُفْيَانَ، عَنْ إِيَادِ بْنِ لَقِيطٍ، عَنْ أَبِي رِمْثَةَ، قَالَ أَتَيْتُ أَنَا وَأَبِي النَّبِيَّ، صلى الله عليه وسلم وَكَانَ قَدْ لَطَخَ لِحْيَتَهُ بِالْحِنَّاءِ .
It was narrated that Abu Rimthah said:"My father and I came to the Prophet [SAW] and he had dyed his beard with Henna
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
In-book reference: 48:44