Musannaf Ibn Abi Shayba 28:956

Abdullah ibn Idris and Muhammad ibn Fudayl narrated to us, from Husayn, from al-Sha’bi, from Urwah al-Bariqi, who attributed it (to the Prophet), he said: "Good is tied to the forelocks of horses until the Day of Resurrection: the reward and the spoils of war." And Ibn Idris added in his hadith: "And camels are the pride of their owners, and sheep are a blessing."