Sahih Bukhari Volume 7, Book 77, Hadith 5898

حَدَّثَنَا مَالِكُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ عُثْمَانَ بْنِ عَبْدِ اللَّهِ بْنِ مَوْهَبٍ، قَالَ أَرْسَلَنِي أَهْلِي إِلَى أُمِّ سَلَمَةَ بِقَدَحٍ مِنْ مَاءٍ ـ وَقَبَضَ إِسْرَائِيلُ ثَلاَثَ أَصَابِعَ ـ مِنْ فِضَّةٍ فِيهِ شَعَرٌ مِنْ شَعَرِ النَّبِيِّ صلى الله عليه وسلم وَكَانَ إِذَا أَصَابَ الإِنْسَانَ عَيْنٌ أَوْ شَىْءٌ بَعَثَ إِلَيْهَا مِخْضَبَهُ، فَاطَّلَعْتُ فِي الْجُلْجُلِ فَرَأَيْتُ شَعَرَاتٍ حُمْرًا‏.‏

Narrated By IsraiI : Uthman bin 'Abdullah bin Mauhab said, "My people sent me with a bowl of water to Um Salama." Isra'il approximated three fingers ('indicating the small size of the container in which there was some hair of the Prophet. 'Uthman added, "If any person suffered from evil eye or some other disease, he would send a vessel (containing water) to Um Salama. I looked into the container (that held the hair of the Prophet) and saw a few red hairs in it."