Majza'ah bin Zahir (may Allah have mercy on him) narrates from his father (Zahir (may Allah be pleased with him)), who had pledged allegiance to the Prophet (peace and blessings be upon him) under the tree, that he fell ill and was told to use she-donkeys' milk and broth; but he disliked that.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19470