Musnad Ahmad 5:123

Yunus narrated to us, Hammad narrated to us, from Abdullah ibn Muhammad ibn Aqil, from Muhammad ibn Ali, from his father, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) was large-headed, with large eyes, long eyelashes, and his eyes were tinged with redness. He had a thick beard and a bright complexion. When he walked, he leaned forward as if he were walking down a slope. When he turned, he turned with his whole body. He had thick palms and feet."