Musannaf Ibn Abi Shayba 36:454

Yazid ibn Harun narrated to us, he said: Hammad ibn Salamah informed us, from Ishaq ibn Abdullah ibn Abi Talhah, from Anas, that the Prophet, peace and blessings of Allah be upon him, said on the day of Hunayn: "Whoever kills a person, then for him is his spoils." So Abu Talhah killed twenty men on that day, and he took their spoils.