Sahih al-Bukhari 4606
صحيح البخاري#4606Sahihحَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، حَدَّثَنَا سُفْيَانُ، عَنْ قَيْسٍ، عَنْ طَارِقِ بْنِ شِهَابٍ، قَالَتِ الْيَهُودُ لِعُمَرَ إِنَّكُمْ تَقْرَءُونَ آيَةً لَوْ نَزَلَتْ فِينَا لاَتَّخَذْنَاهَا عِيدًا. فَقَالَ عُمَرُ إِنِّي لأَعْلَمُ حَيْثُ أُنْزِلَتْ، وَأَيْنَ أُنْزِلَتْ، وَأَيْنَ رَسُولُ اللَّهِ صلى الله عليه وسلم حِينَ أُنْزِلَتْ يَوْمَ عَرَفَةَ، وَإِنَّا وَاللَّهِ بِعَرَفَةَ ـ قَالَ سُفْيَانُ وَأَشُكُّ كَانَ يَوْمَ الْجُمُعَةِ أَمْ لاَ – {الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ}
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 Messenger (ﷺ) 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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 65:128