Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) said that a man said to Umar (may Allah be pleased with him): O Commander of the Believers! There is a verse in your Book which you recite; had it been revealed to us Jews, we would have celebrated that day as a festival (Eid). He (may Allah be pleased with him) asked: Which verse is it? He said: "This day I have perfected your religion for you, completed My favour upon you, and chosen Islam as your religion." [Surah al-Ma'idah: 3] So Umar (may Allah be pleased with him) said: We know that day, and also the place where this verse was revealed to the Prophet (peace and blessings be upon him); this verse was revealed to him (peace and blessings be upon him) on the plain of Arafat on a Friday.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9478