(31) باب تَحْرِيمِ أَكْلِ لُحُومِ الْحُمُرِ الأَهْلِيَّةِ
It was narrated from Abu Tha''Aabah Al-Khushani that:
they went on a military campaign with the Messenger of Allah to Khaibar, and the people were starving. They found some domesticated donkeys there, so the people slaughtered some of them. The Prophet was told about that, and he ordered 'Abdur-rahman bin 'Awf to announce to the people: "The flesh of domesticated donkeys is not permissible for the one who testifies that I am the Messenger of Allah."
Reference: Sunan an-Nasa'i 4341
In-book reference: Book 42, Hadith 79
English translation: Vol. 5, Book 42, Hadith 4346