Musannaf Ibn Abi Shayba 16:779

Abu Bakr narrated to us, he said: Yunus bin Muhammad narrated to us, he said: Salam bin Abi Muti’ narrated to us, from Uthman bin Mawhab, who said: I entered upon Umm Salamah, and she brought out to me a hair from the hair of the Messenger of Allah, may Allah bless him and grant him peace, dyed with henna and katam.