“We used to eat the meat of horses.” I said: “And mules?” He said: “No.”  

كُنَّا نَأْكُلُ لُحُومَ الْخَيْلِ قُلْتُ فَالْبِغَالُ قَالَ لاَ  

“The Messenger of Allah ﷺ forbade the flesh of horses, mules and donkeys.”  

نَهَى رَسُولُ اللَّهِ ﷺ عَنْ لُحُومِ الْخَيْلِ وَالْبِغَالِ وَالْحَمِيرِ