ENOfficial
Jabir said that on the day of Khaibar God’s messenger forbade the flesh of domestic asses, but permitted horseflesh. (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ جَابِرٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى يَوْمَ خَيْبَرَ عَنْ لُحُومِ الْحُمُرِ الْأَهْلِيَّةِ وَأَذِنَ فِي لُحُومِ الْخَيْلِ
sunnah.com