Sahih al-Bukhari 5897
Sahih al-Bukhari · Book 77: Dress · What is said about grey hair
Narrated `Uthman bin `Abdullah bin Mauhab:
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ ، حَدَّثَنَا سَلاَّمٌ ، عَنْ عُثْمَانَ بْنِ عَبْدِ اللَّهِ بْنِ مَوْهَبٍ ، قَالَ دَخَلْتُ عَلَى أُمِّ سَلَمَةَ فَأَخْرَجَتْ إِلَيْنَا شَعَرًا مِنْ شَعَرِ النَّبِيِّ صلى الله عليه وسلم مَخْضُوبًا .
I went to Um Salama and she brought out for us some of the dyed hair of the Prophet.