388.Narrated Umar bin Al-Khattab (Allah be pleased with him). Once a Jew said to me, "O the chief of believers! There is a verse in your Holy Book which is read by all of you (Muslims), and had it been revealed to us, we would have taken that day (on which it was revealed) as a day of celebration." Umar bin Al-Khattab (Allah be pleased with him) asked, "Which is that verse?" The Jew replied,

"This day I have perfected your religion for you, completed My favour upon you, And have chosen for you Islam as your religion." (5:3)

Umar (Allah be pleased with him) replied, "No doubt, we know when and where this verse was revealed to the Prophet (peace be upon him) . It was Friday and the Prophet (peace be upon him) was standing at Arafat (i.e. the Day of Hajj)."
(Sahih Al-Bukhari Vol 1).
(Dr. Muhammad Muhsin Khan et.al.).