Yahya related to me from Malik from Hisham ibn Urwa from his
father that the man who was in charge of the sacrificial animal of the
Messenger of Allah, may Allah bless him and grant him peace, said,
"Messenger of Allah, what should I do with a sacrificial animal that
gets injured?" The Messenger of Allah, may Allah bless him and grant
him peace, said to him, "Slaughter any sacrificial animal that is
injured. Then throw the garlands in its blood, and then give the
people a free hand in eating it.
Muwatta Malik Book 20, Hadith 157