Musnad Ahmad 27:1556

Hashim narrated to us, Ishaq bin Sa'id narrated to us, from his father, who said: I departed with Ibn Umar on the day of departure (from Mina). A Yemeni caravan passed by us, their saddles were of tanned leather, and the nose-reins of their camels were of twisted bark. Abdullah bin Umar said: "Whoever wishes to look at the caravan that most resembles the Messenger of Allah, may Allah bless him and grant him peace, and his companions, when they arrived for the Farewell Pilgrimage, let him look at this caravan."