On the day of Khaibar the Messenger of Allah ﷺ forbade us to eat the flesh of domestic asses, and ordered us to eat horse-flesh. ‘Amr said: I informed Abu al-Sha’tha’ about this tradition. He said: Al-Hakam al-Ghifari among us said this, and the” ocean” denied that, intending thereby Ibn’ Abbas.  

نَهَى رَسُولُ اللَّهِ ﷺ يَوْمَ خَيْبَرَ عَنْ أَنْ نَأْكُلَ لُحُومَ الْحُمُرِ وَأَمَرَنَا أَنْ نَأْكُلَ لُحُومَ الْخَيْلِ قَالَ عَمْرٌو فَأَخْبَرْتُ هَذَا الْخَبَرَ أَبَا الشَّعْثَاءِ فَقَالَ قَدْ كَانَ الْحَكَمُ الْغِفَارِيُّ فِينَا يَقُولُ هَذَا وَأَبَى ذَلِكَ الْبَحْرُ يُرِيدُ ابْنَ عَبَّاسٍ  

We faced a famine, and I had nothing from my property which I could feed my family ex except a few asses, and the Prophet ﷺ forbade the flesh of domestic asses. So I came to the Prophet ﷺ and said: Messenger of Allah (may peace be upon) , we are suffering from famine, and I have no property which I feed my family except some fat asses, and you have forbidden the flesh of domestic asses. He said: Feed your family on the fat asses of yours, for I forbade them on account of the animal which feeds on the filth of the town, that is, the animal which feeds on filth. Abu Dawud said: This 'Abd al-Rahman is Ibn Ma'qil. Abu Dawud said: Suh'bah transmitted this tradition from 'Ubaid Abi al-Hasan, from 'Abd al-Rahman bin Maq'il, from'Abd al-Rahman bin Bishr, from some people of Muzainah stating that Abjar, the chief of Muzainah, or Ibn Abjar asked the Prophet ﷺ.  

أَصَابَتْنَا سَنَةٌ فَلَمْ يَكُنْ فِي مَالِي شَىْءٌ أُطْعِمُ أَهْلِي إِلاَّ شَىْءٌ مِنْ حُمُرٍ وَقَدْ كَانَ رَسُولُ اللَّهِ ﷺ حَرَّمَ لُحُومَ الْحُمُرِ الأَهْلِيَّةِ فَأَتَيْتُ النَّبِيَّ ﷺ فَقُلْتُ يَا رَسُولَ اللَّهِ أَصَابَتْنَا السَّنَةُ وَلَمْ يَكُنْ فِي مَالِي مَا أُطْعِمُ أَهْلِي إِلاَّ سِمَانُ الْحُمُرِ وَإِنَّكَ حَرَّمْتَ لُحُومَ الْحُمُرِ الأَهْلِيَّةِ فَقَالَ أَطْعِمْ أَهْلَكَ مِنْ سَمِينِ حُمُرِكَ فَإِنَّمَا حَرَّمْتُهَا مِنْ أَجْلِ جَوَالِّ الْقَرْيَةِ يَعْنِي الْجَلاَّلَةَ  

I think it was Ghalib who had come to the Prophet ﷺ with tradition.  

مِسْعَرٌ أَرَى غَالِبًا الَّذِي أَتَى النَّبِيَّ ﷺ بِهَذَا الْحَدِيثِ  

On the day of Khaybar the Messenger of Allah (may pease be upon him) forbade (eating) the flesh of domestic asses, and the animal which feeds on filth: riding it and eating its flesh.  

نَهَى رَسُولُ اللَّهِ ﷺ يَوْمَ خَيْبَرَ عَنْ لُحُومِ الْحُمُرِ الأَهْلِيَّةِ وَعَنِ الْجَلاَّلَةِ عَنْ رُكُوبِهَا وَأَكْلِ لَحْمِهَا