Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: In the head and beard of the Prophet (peace and blessings be upon him) there were only a few white hairs, which were in the parting of his head; when he (peace and blessings be upon him) applied oil, they became hidden.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1950