Ayyub narrates from Ikrimah (may Allah have mercy on him) that Ibn Abbas (may Allah be pleased with them both) did not fast at Arafat. A pomegranate was brought to him and he ate it, and he said: Umm al-Fadl (may Allah be pleased with her) narrated to me that the Messenger of Allah (peace and blessings be upon him) did not fast at Arafat; Umm al-Fadl (may Allah be pleased with her) brought him milk, and he (peace and blessings be upon him) drank it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8388