Volume 6, Book 60, Number 130:
Narrated Tariq bin Shihab:
The Jews said to ‘Umar, “You (i.e. Muslims) recite a Verse, and had it been revealed to us, we would
have taken the day of its revelation as a day of celebration.” ‘Umar said, “I know very well when and
where it was revealed, and where Allah’s Apostle was when it was revealed. (It was revealed on) the
day of Arafat (Hajj Day), and by Allah, I was at Arafat” Sufyan, a sub-narrator said: I am in doubt
whether the Verse:– “This day I have perfected your religion for you.” was revealed on a Friday or
not.