Umm Fadl bint Harith (may Allah be pleased with her) narrated that there was a difference of opinion among the people at her place regarding whether the Messenger of Allah (peace and blessings be upon him) was fasting on the day of Arafat. Some said that he was fasting, while others said that he was not. So she (Umm Fadl) sent a bowl of milk to him. The Prophet (peace and blessings be upon him) was standing in Arafat at that time, mounted on his camel. He drank that milk.
Hadith Referenceاللؤلؤ والمرجان / كتاب الصيام / 686
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 25 كتاب الحج: 88 باب الوقوف على الدابة بعرفة»