Sunan An-Nasa'i

It was narrated that Tariq bin Shihab said:A Jew said to `Umar: ""If this Verse had been revealed to us, we would have taken it as a festival (Eid): 'This day, I have perfected your religion for you.'"" Umar said: ""I know the day when it was revealed and the night on which it was revealed: a Friday night when we were with Messenger of Allah in Arafat