Sunan an-Nasa'i 5243
سنن النسائي#5243Sahihأَخْبَرَنَا يَحْيَى بْنُ حَكِيمٍ، قَالَ حَدَّثَنَا أَبُو قُتَيْبَةَ، قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عُبَيْدٍ، قَالَ رَأَيْتُ ابْنَ عُمَرَ يُصَفِّرُ لِحْيَتَهُ فَقُلْتُ لَهُ فِي ذَلِكَ فَقَالَ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يُصَفِّرُ لِحْيَتَهُ .
It was narrated that 'Ubaid said:"I saw Ibn 'Umar dyeing his beard yellow and I asked him about that. 'He said: "I saw the Prophet [SAW] dye his beard yellow
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:
In-book reference: 48:204