Mishkat al-Masabih 22 Clothing كتاب اللباس 50

وَعَن أبي رِمْثةَ التيميِّ قَالَ: أَتَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَعَلَيْهِ ثَوْبَانِ أَخْضَرَانِ وَلَهُ شَعَرٌ قَدْ عَلَاهُ الشَّيْبُ وَشَيْبُهُ أَحْمَرُ. رَوَاهُ التِّرْمِذِيُّ وَفِي رِوَايَةٍ لِأَبِي دَاوُدَ: وَهُوَ ذُو وَفْرَةٍ وَبِهَا رَدْعٌ من حناء

Abu Rimtha at-Taimi said: When I came to the Prophet he was wearing two green garments, his hair was turning grey, but the grey was dyed red. Tirmidhi transmitted it; In a version by Abu Dawud it says he had hanging locks (These locks would hang down as far as the lobes of the ears) stained with henna.