Yahya related to me from Malik that Ibn Shihab said, "If someonededicates an animal as compensation, or for a vow, or as the sacrificefor tamattu, and misfortune befalls it on the road, he must provide asubstitute." (DE)
USC-MSA web (English) reference: Book 20, Hadith 157 (DE)
Arabic reference (DE): Book 20, Hadith 860 (DE)