Jabir bin 'Abdullah is reported to have said: We ate during the time of Khaibar the (flesh) of horses and of wild asses, but Allah's Messenger (ﷺ) prohibited us (to eat) the flesh of domestic asses.
Hadith Referenceصحيح مسلم / كتاب الصيد والذبائح وما يؤكل من الحيوان / 1941