مسند أحمد

It was narrated that Nafi’ bin Jubair bin Mut`im said. `Ali (رضي الله عنه) was asked about how the Prophet (ﷺ) looked. He said: He was not short and not tall, and he had a reddish colour and beautiful, slightly wavy hair. He had large joints and large hands, a large head and a long line of hair running from his chest to his navel. When he walked, he walked energetically as if he was walking downhill, I have never seen anyone like him (ﷺ) before or after.