Muwatta Malik 857
موطأ مالك#857SahihYahya related to me from Malik that Ibn Shihab said, "If someone dedicates an animal as compensation, or for a vow, or as the sacrifice for tamattu, and misfortune befalls it on the road, he must provide a substitute
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMaqtu Sahih
In-book reference: 20:153