Sunan an-Nasa'i, Volume 6, Book 48, Hadith 5244 (DarusSalam) ⓘ
It was narrated that Jabir said: "Abu Quhafah was brought to the Messenger of Allah [SAW] and his head and beard were white like the Thaghamah. The Prophet [SAW] said: 'Change this, or dye it.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، - وَهُوَ ابْنُ الْحَارِثِ - قَالَ حَدَّثَنَا عَزْرَةُ، - وَهُوَ ابْنُ ثَابِتٍ - عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ أُتِيَ النَّبِيُّ صلى الله عليه وسلم بِأَبِي قُحَافَةَ وَرَأْسُهُ وَلِحْيَتُهُ كَأَنَّهُ ثَغَامَةٌ فَقَالَ النَّبِيُّ صلى الله عليه وسلم " غَيِّرُوا أَوِ اخْضِبُوا " .
also referenced under: Hadith 5242 (Reference) & Book 48, Hadith 203 (In-Book)