[Machine] That the Prophet ﷺ used to deliver the sermon on Fridays standing up, and a caravan from Sham arrived, so the people rushed towards it until only twelve men were left with him. Then this verse was revealed in Surah Al-Jumu'ah: "And when they saw a transaction or a diversion, [O Muhammad], they rushed to it and left you standing." [Surah Al-Jumu'ah 62:11]  

أَنَّ النَّبِيَّ ﷺ كَانَ يَخْطُبُ يَوْمَ الْجُمُعَةِ قَائِمًا فَجَاءَتْ عِيرٌ مِنَ الشَّامِ فَانْفَتَلَ النَّاسُ إِلَيْهَا حَتَّى لَمْ يَبْقَ مَعَهُ إِلَّا اثْنَا عَشَرَ رَجُلًا فَأُنْزِلَتْ هَذِهِ الْآيَةُ الَّتِي فِي الْجُمُعَةِ {وَإِذَا رَأَوْا تِجَارَةً أَوْ لَهْوًا انْفَضُّوا إِلَيْهَا وَتَرَكُوكَ قَائِمًا} [الجمعة 11]  

While we were praying (Jumua Khutba & prayer) with the Prophet ﷺ, some camels loaded with food, arrived (from Sham). The people diverted their attention towards the camels (and left the mosque), and only twelve persons remained with the Prophet. So this verse was revealed: "But when they see Some bargain or some amusement, They disperse headlong to it, And leave you standing." (62.11) (Using translation from Bukhārī 936)   

بَيْنَمَا نَحْنُ نُصَلِّي الْجُمُعَةَ مَعَ رَسُولِ اللهِ ﷺ إِذْ أَقْبَلَتْ عِيرٌ تَحْمِلُ طَعَامًا قَالَ فَالْتَفَتُوا فَانْصَرَفُوا حَتَّى مَا بَقِيَ مَعَ رَسُولِ اللهِ ﷺ إِلَّا اثْنَا عَشَرَ رَجُلًا فَنَزَلَتْ {وَإِذَا رَأَوْا تِجَارَةً أَوْ لَهْوًا انْفَضُّوا إِلَيْهَا وَتَرَكُوكَ قَائِمًا} [الجمعة 11]  

[Machine] A caravan arrived while we were with the Messenger of Allah ﷺ praying Jumu'ah. The people rushed towards it until only twelve men remained. Then this verse was revealed: "And when they saw a transaction or a diversion, [O Muhammad], they rushed to it" (Surah Al-Jumu'ah, verse 11).  

أَقْبَلَتْ عِيرٌ وَنَحْنُ مَعَ رَسُولِ اللهِ ﷺ نُصَلِّي الْجُمُعَةَ فَانْصَبَّ النَّاسُ إِلَيْهَا فَمَا بَقِيَ إِلَّا اثْنَا عَشَرَ رَجُلًا فَنَزَلَتْ هَذِهِ الْآيَةُ {وَإِذَا رَأَوْا تِجَارَةً أَوْ لَهْوًا انْفَضُّوا إِلَيْهَا} [الجمعة 11]  

[Machine] While the Messenger of Allah ﷺ was delivering a sermon on Friday, a caravan carrying food came. They stopped at al-Baqi' and the people turned towards it and dispersed towards it, leaving the Messenger of Allah ﷺ with only forty men, of whom I was one. Allah then revealed the verse to the Prophet ﷺ : "And when they saw some merchandise or some amusement, they rushed to it and left you standing." (Surah Al-Jumu'ah, 11) Ali said: In this chain of narration, no one narrated this except for forty men besides Ali ibn Asim, who was narrating from Husayn. However, the companions of Husayn disagreed with him and said, "There were only twelve men left with the Prophet ﷺ ." The sheikh said the most similar narration is that which is narrated by whoever narrated that it was during the sermon, and the statement of the one who said, "We intended to pray Jumu'ah with him" meant the sermon, as if he expressed the sermon through prayer. The hadith of Ka'b ibn 'Ujra also indicates this, and that is what Allah wills, if He wills.  

بَيْنَمَا رَسُولُ اللهِ ﷺ يَخْطُبُنَا يَوْمَ الْجُمُعَةِ إِذْ أَقْبَلَتْ عِيرٌ تَحْمِلُ الطَّعَامَ حَتَّى نَزَلُوا بِالْبَقِيعِ فَالْتَفَتُوا إِلَيْهَا وَانْفَضُّوا إِلَيْهَا وَتَرَكُوا رَسُولَ اللهِ ﷺ لَيْسَ مَعَهُ إِلَّا أَرْبَعُونَ رَجُلًا أَنَا فِيهِمْ قَالَ فَأَنْزَلَ اللهُ عَلَى النَّبِيِّ ﷺ {وَإِذَا رَأَوْا تِجَارَةً أَوْ لَهْوًا انْفَضُّوا إِلَيْهَا وَتَرَكُوكَ قَائِمًا} [الجمعة 11] قَالَ عَلِيٌّ لَمْ يَقُلْ فِي هَذَا الْإِسْنَادِ إِلَّا أَرْبَعِينَ رَجُلًا غَيْرُ عَلِيِّ بْنِ عَاصِمٍ عَنْ حُصَيْنٍ وَخَالَفَهُ أَصْحَابُ حُصَيْنٍ فَقَالُوا لَمْ يَبْقَ مَعَ النَّبِيِّ ﷺ إِلَّا اثْنَا عَشَرَ رَجُلًا قَالَ الشَّيْخُ وَالْأَشْبَهُ أَنْ يَكُونَ الصَّحِيحُ رِوَايَةَ مَنْ رَوَى أَنَّ ذَلِكَ كَانَ فِي الْخُطْبَةِ وَقَوْلُ مَنْ قَالَ نُصَلِّي مَعَهُ الْجُمُعَةَ أَرَادَ بِهِ الْخُطْبَةَ وَكَأَنَّهُ عَبَّرَ بِالصَّلَاةِ عَنِ الْخُطْبَةِ وَحَدِيثُ كَعْبِ بْنِ عُجْرَةَ يَدُلُّ عَلَى ذَلِكَ أَيْضًا وَذَلِكَ يَرِدُ إِنْ شَاءَ اللهُ تَعَالَى