It wasnarrated that Abu Sa'eed Al-Khudri said:
"We bought a ram forsacrifice, then a wolf tore some flesh from its rump and ears. Weasked the Prophet (ﷺ) and he told us to offer it as a sacrifice." (IT)
English reference (IT): Vol. 4, Book 26, Hadith 3146 (IT)
Arabic reference (IT): Book 26, Hadith 3266 (IT)