The Book of Hunting, Slaughter, and what may be Eaten
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا مُحَمَّدُ بْنُ بَكْرٍ، أَخْبَرَنَا ابْنُ جُرَيْجٍ، أَخْبَرَنِي أَبُو الزُّبَيْرِ أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ، يَقُولُ أَكَلْنَا زَمَنَ خَيْبَرَ الْخَيْلَ وَحُمُرَ الْوَحْشِ وَنَهَانَا النَّبِيُّ صلى الله عليه وسلم عَنِ الْحِمَارِ الأَهْلِيِّ .Jabir b. '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
From Sahih Muslim, whose reports the scholars accept as authentic.