Musnad Ahmad 907:180

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Simak, who said: I heard Jabir ibn Samurah say: "The Messenger of Allah (peace and blessings of Allah be upon him) was *dali‘ al-fam* (wide-mouthed), *ashkal al-‘ayn* (long-eyelashed), and *manhus al-‘aqibayn* (lean-heeled)." I said to Simak: "What is *dali‘ al-fam*?" He said: "Large-mouthed." I said: "What is *ashkal al-‘ayn*?" He said: "Long-eyelashed." I said: "What is *manhus al-‘aqib*?" He said: "Little flesh on the heel."