Sahih Muslim 7526
صحيح مسلم#7526SahihTariq b. Shihab reported that a Jew said to 'Umar:If this verse were revealed in relation to the Jews (i e. "This day I have perfected your religion for you and have completed My favours for you and have chosen for you al-Islam as religion") we would have taken the day of rejoicing on which this verse was revealed. Thereupon 'Umar said: I know the day on which it was revealed and the hour when it was revealed and where Allah's Messenger (ﷺ) had been when it was revealed. It was revealed on the night of Friday and we were in 'Arafat with Allah's Messenger (ﷺ) at that time
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 56:4