Shu'bah said: Ja'dah, one of the sons of Umm Hani (may Allah be pleased with her), narrated to me from Umm Hani (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) came to her, and she gave him (peace and blessings be upon him) a drink. He (peace and blessings be upon him) drank, then gave it to Umm Hani (may Allah be pleased with her), and she drank too and said: O Messenger of Allah (peace and blessings be upon him), I was fasting. The Messenger of Allah (peace and blessings be upon him) said: "The one observing a voluntary fast is a trustee and master of himself: if he wishes he fasts, and if he wishes he breaks the fast."
Shu'bah said: I said to Ja'dah: Did you hear it yourself from Umm Hani? He said: Our family and Abu Salih, the freed slave of Umm Hani, told me from Umm Hani.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8349