Sahih Muslim | Book 30 | Hadith Number 5779
Narrated by Ibn Sirin
Ibn Sirin reported: Anas b. Malik was asked whether Allah's Messenger (may peace be upon him) dyed his hair. He said: He had not become old enough to have white hair. Ibn Idris said that he had a few white hair. Abu Bakr and Umar, however, dyed hair with hina' (henna).