Musnad Ahmad 31:750

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Jabir, who said: I heard Muhammad ibn Qurazah narrating from Abu Sa‘id al-Khudri—I said: Did he hear it from Abu Sa‘id, Muhammad? He said: No. He said: I bought a sacrificial animal, then a wolf came and ate from its tail, or it ate its tail. So I asked the Messenger of Allah, peace and blessings of Allah be upon him, and he said: "Sacrifice it."