He was asked about the gray hair of the Prophet ﷺ. He said, "There were a few hairs on his head. When he oiled his hair, they were not visible, but when he did not oil it, they showed."
حدثنا سليمان بن داود أخبرنا شعبة عن سماك قال
وسئل عن شيب النبي ﷺ قال كان في رأسه شعرات إذا دهن رأسه لم تتبين وإذا لم يدهنه تتبين