The Book of Adornment
48/66. Chapter:
Dyeing the Beard Yellow with Wars and Saffron
Sunan an-Nasai
أَخْبَرَنَا عَبْدَةُ بْنُ عَبْدِ الرَّحِيمِ، قَالَ أَنْبَأَنَا عَمْرُو بْنُ مُحَمَّدٍ، قَالَ أَنْبَأَنَا ابْنُ أَبِي رَوَّادٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يَلْبَسُ النِّعَالَ السِّبْتِيَّةَ وَيُصَفِّرُ لِحْيَتَهُ بِالْوَرْسِ وَالزَّعْفَرَانِ . وَكَانَ ابْنُ عُمَرَ يَفْعَلُ ذَلِكَ .
It was narrated that Ibn 'Umar said: "The Prophet [SAW] used to wear Sibtiyyah sandals and dye his beard yellow with Wars and saffron." And Ibn 'Umar used to do that.
Reference : Sunan an-Nasa'i 5244In-book reference : Book 48, Hadith 205English translation : Vol. 6, Book 48, Hadith 5246