Hadith 14:230
Abu Bakr narrated to us, he said: Abu Usamah narrated to us, from Hisham, from al-Hasan and Muhammad, that they both used to dislike being treated medically with the milk of female donkeys. And they said: "It is forbidden."
حدثنا أبو بكر قال حدثنا أبو أسامة عن هشام عن الحسن ومحمد أنهما كانا يكرهان أن يتداوى بألبان الأتن وقالا هي حرام