"On the Day of Khaibar we ate the flesh of horses, and onagers, but the Prophet forbade us (from eating) donkeys."(sahih)
Sunan an-Nasa'i Book 42, Hadith 81
← Previous Hadith the Messenger of Allah forbade eating any -predator with fangs, and the flesh of domesticated donkeys.

Sunan an-Nasa'i Book 42, Hadith 80 Next Hadith → "While we were traveling with the Prophet in part of Athaya Ar-Rawha and they were in Ihram, we saw a wounded onager, the Messenger of Allah said: "Leave it, for soon the one who wounded it will come,' then a man from Bahz came, and he was the one who had wounded the onager. He said: 'O Messenger of Allah, it is up to you what you do with this onager,' The Messenger of Allah ordered Abu Bakr to distribute it among the people."

Sunan an-Nasa'i Book 42, Hadith 82