It wasnarrated that 'Uthman bin Mawhab said:
"I entered upon UmmSalamah and she brought out for me a hair of the Messenger of Allah(ﷺ), which was dyed with henna and Katam." (TR)
English reference (TR): Vol. 4, Book 32, Hadith 3623 (TR)
Arabic reference (TR): Book 32, Hadith 3754 (TR)