Ikrimah (may Allah have mercy on him) narrates: We were with Abu Hurayrah (may Allah be pleased with him) in his house, and he narrated to us that the Messenger of Allah (peace and blessings be upon him) "forbade fasting on the Day of Arafah at Arafat."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8389