Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) forbade "fasting on the day of Arafah on the plain of Arafat."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9472
Hadith Gradingمحدثین:منكر
Hadith Takhrij«منكر۔ ابوداود 2440۔ ابن ماجه، حاكم 1/ 424»