There were only a few gray hairs on the head of the Messenger of Allah ﷺ, located at the parting of his head. Whenever he applied oil, it would cover them.
حدثنا عبد الرحمن بن مهدي عن حماد بن سلمة عن سماك بن حرب
ما كان في رأس رسول الله ﷺ من الشيب إلا شعرات في مفرق رأسه كان إذا ادهن غطاهن