I went to Um Salama and she brought out for us some of the dyed hair of the Prophet.
Sahih al-Bukhari Book 77, Hadith 114
← Previous Hadith `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,"

Sahih al-Bukhari Book 77, Hadith 113 Next Hadith → Ibn Mauhab also said that Um Salama had shown him the red hair of the Prophet.

Sahih al-Bukhari Book 77, Hadith 115