This day I have perfected

Tariq ibn Shihab reported: A Jew said to Umar, “You recite a verse which, if it had been revealed to us, we would have taken that day as a holiday.” Umar said, “I know the place and the day on which it was revealed and where the Messenger of Allah, peace be upon him, had been. It was revealed on the day of Arafat where the Messenger of Allah had been staying.” Sufyan said, “I am not sure if it was Friday or not; the verse was: This day I have perfected your religion for you and completed My favor upon you and have chosen Islam as your religion (5:3).”

[Sahih Muslim, Book 43, Number 7153]

عَنْ طَارِقِ بْنِ شِهَابٍ أَنَّ الْيَهُودَ قَالُوا لِعُمَرَ إِنَّكُمْ تَقْرَءُونَ آيَةً لَوْ أُنْزِلَتْ فِينَا لَاتَّخَذْنَا ذَلِكَ الْيَوْمَ عِيدًا فَقَالَ عُمَرُ إِنِّي لَأَعْلَمُ حَيْثُ أُنْزِلَتْ وَأَيَّ يَوْمٍ أُنْزِلَتْ وَأَيْنَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حَيْثُ أُنْزِلَتْ أُنْزِلَتْ بِعَرَفَةَ وَرَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَاقِفٌ بِعَرَفَةَ  قَالَ سُفْيَانُ أَشُكُّ كَانَ يَوْمَ جُمُعَةٍ أَمْ لَا يَعْنِي الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي

صحيح مسلم أن الله عز وجل تابع الوحي على رسول الله صلى الله عليه وسلم قبل وفاته حتى توفي