Tariq bin Shihab said that a Jew said to Umar bin al-Khattab (may Allah be pleased with him): If only this verse, "This day I have perfected your religion for you" (to the end of the verse) [Surah al-Ma'idah: 3], had been revealed to us Jews, we would have celebrated that day as a festival (Eid). So Umar (may Allah be pleased with him) said: I know the place, the day and the time when this verse was revealed. It was revealed to the Messenger of Allah (peace and blessings be upon him) while we were at Arafah, on the afternoon of Friday.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9479