Jabir b. 'Abdullah reported that Messenger of Allah ﷺ prohibited eating of the flesh of domestic asses on the Day of Khaibar, and permitted the cooking of the flesh of horses.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى يَوْمَ خَيْبَرَ عَنْ لُحُومِ الْحُمُرِ الأَهْلِيَّةِ وَأَذِنَ فِي لُحُومِ الْخَيْلِ  

We ate during the time of Khaibar the (flesh) of horses and of wild asses, but Messenger of Allah ﷺ prohibited us (to eat) the flesh of domestic asses.  

أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ يَقُولُ أَكَلْنَا زَمَنَ خَيْبَرَ الْخَيْلَ وَحُمُرَ الْوَحْشِ وَنَهَانَا النَّبِيُّ ﷺ عَنِ الْحِمَارِ الأَهْلِيِّ  

This hadith has hen transmitted on the authority of Ibn Juraij.  

عَنِ ابْنِ جُرَيْجٍ بِهَذَا الإِسْنَادِ  

We slaughtered a horse and ate it during the lifetime of Messenger of Allah ﷺ.  

نَحَرْنَا فَرَسًا عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فَأَكَلْنَاهُ  

This hadith has been transmitted on the authority of Hisham.  

عَنْ هِشَامٍ بِهَذَا الإِسْنَادِ