Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that on the day of Khaybar the Messenger of Allah (peace and blessings be upon him) "forbade eating the meat of beasts of prey with fangs, of the animal tied up and shot to death, and of domestic donkeys."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19467