Sahih al-Bukhari, Book 64, Hadith 264 (In-Book) ⓘ
Narrated Al-Bara Bin Azib: During the Ghazwa of Khaibar, the Prophet ordered us to throw away the meat of the donkeys whether it was still raw or cooked. He did not allow us to eat it later on.
حَدَّثَنِي إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا ابْنُ أَبِي زَائِدَةَ، أَخْبَرَنَا عَاصِمٌ، عَنْ عَامِرٍ، عَنِ الْبَرَاءِ بْنِ عَازِبٍ ـ رضى الله عنهما ـ قَالَ أَمَرَنَا النَّبِيُّ صلى الله عليه وسلم فِي غَزْوَةِ خَيْبَرَ أَنْ نُلْقِيَ الْحُمُرَ الأَهْلِيَّةَ نِيئَةً وَنَضِيجَةً، ثُمَّ لَمْ يَأْمُرْنَا بِأَكْلِهِ بَعْدُ.
also referenced under: Hadith 4226 (DarusSalam) & Volume 5, Book 59, Hadith 535 (USC-MSA)