Sahih Bukhari Volume 5, Book 64, Hadith 4456

قَالَ الزُّهْرِيُّ وَحَدَّثَنِي أَبُو سَلَمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّ أَبَا بَكْرٍ، خَرَجَ وَعُمَرُ يُكَلِّمُ النَّاسَ فَقَالَ اجْلِسْ يَا عُمَرُ، فَأَبَى عُمَرُ أَنْ يَجْلِسَ‏.‏ فَأَقْبَلَ النَّاسُ إِلَيْهِ وَتَرَكُوا عُمَرَ، فَقَالَ أَبُو بَكْرٍ أَمَّا بَعْدُ مَنْ كَانَ مِنْكُمْ يَعْبُدُ مُحَمَّدًا صلى الله عليه وسلم فَإِنَّ مُحَمَّدًا قَدْ مَاتَ، وَمَنْ كَانَ مِنْكُمْ يَعْبُدُ اللَّهَ فَإِنَّ اللَّهَ حَىٌّ لاَ يَمُوتُ، قَالَ اللَّهُ ‏{‏وَمَا مُحَمَّدٌ إِلاَّ رَسُولٌ قَدْ خَلَتْ مِنْ قَبْلِهِ الرُّسُلُ‏}‏ إِلَى قَوْلِهِ ‏{‏الشَّاكِرِينَ‏}‏ وَقَالَ وَاللَّهِ لَكَأَنَّ النَّاسَ لَمْ يَعْلَمُوا أَنَّ اللَّهَ أَنْزَلَ هَذِهِ الآيَةَ حَتَّى تَلاَهَا أَبُو بَكْرٍ، فَتَلَقَّاهَا مِنْهُ النَّاسُ كُلُّهُمْ فَمَا أَسْمَعُ بَشَرًا مِنَ النَّاسِ إِلاَّ يَتْلُوهَا‏.‏ فَأَخْبَرَنِي سَعِيدُ بْنُ الْمُسَيَّبِ أَنَّ عُمَرَ قَالَ وَاللَّهِ مَا هُوَ إِلاَّ أَنْ سَمِعْتُ أَبَا بَكْرٍ تَلاَهَا فَعَقِرْتُ حَتَّى مَا تُقِلُّنِي رِجْلاَىَ، وَحَتَّى أَهْوَيْتُ إِلَى الأَرْضِ حِينَ سَمِعْتُهُ تَلاَهَا أَنَّ النَّبِيَّ صلى الله عليه وسلم قَدْ مَاتَ‏.‏

Narrated Ibn 'Abbas: Abu Bakr went out while Umar bin Al-Khattab was talking to the people. Abu Bakr said, "Sit down, O 'Umar!" But 'Umar refused to sit down. So the people came to Abu Bakr and left Umar. Abu Bakr said, "To proceed, if anyone amongst you used to worship Muhammad , then Muhammad is dead, but if (anyone of) you used to worship Allah, then Allah is Alive and shall never die. Allah said: "Muhammad is no more than an Apostle, and indeed (many) apostles have passed away before him...(till the end of the Verse)... Allah will reward to those who are thankful." (3.144) By Allah, it was as if the people never knew that Allah had revealed this Verse before till Abu Bakr recited it and all the people received it from him, and I heard everybody reciting it (then). Narrated Az-Zuhri: Said bin Al-Musaiyab told me that 'Umar said, "By Allah, when I heard Abu Bakr reciting it, my legs could not support me and I fell down at the very moment of hearing him reciting it, declaring that the Prophet had died."