Sayyidah Aishah (may Allah be pleased with her) said: Month after month would pass over the family of Muhammad (peace and blessings be upon him) and no fire would be lit in his stove; (there was nothing) except dates and water. Around us were houses of the Ansar, and the Ansar would send a milk-giving goat to the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) would get milk from it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13312