There were no gray hairs on the Messenger of Allah's ﷺ head except for a few strands at the parting of his hair, which the oil would conceal whenever he applied it.
حدثنا بهز حدثنا حماد بن سلمة عن سماك
ما كان في رأس رسول الله ﷺ من الشيب إلا شعرات في مفرق رأسه إذا هو ادهن واراهن الدهن