It was narrated from Sa’eed bin Abu Sa’eed that ‘Ubaid bin Juraij asked Ibn ‘Umar:
“I see that you dye your beard yellow with Wars.” Ibn ‘Umar said: “As for my dyeing of my beard yellow with Wars, I saw the Messenger of Allah ﷺ dyeing his beard yellow.”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ سَعِيدِ بْنِ أَبِي سَعِيدٍ، أَنَّ عُبَيْدَ بْنَ جُرَيْجٍ، سَأَلَ ابْنَ عُمَرَ قَالَ رَأَيْتُكَ تُصَفِّرُ لِحْيَتَكَ بِالْوَرْسِ فَقَالَ ابْنُ عُمَرَ أَمَّا تَصْفِيرِي لِحْيَتِي فَإِنِّي رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُصَفِّرُ لِحْيَتَهُ .