Jabir b. Abdullah reported: We were along with Messenger of Allah ﷺ in an expedition that a person from amongst the emigrants struck at the back of a person from the Ansir. The Ansiri said: O Ansar! And the Muhijir said: O Emigrants! Thereupon Messenger of Allah ﷺ said: What are these proclamations of the Days of Ignorance? They said: Allah's Messenger, a person from the emigrants struck at the back of an Ansari, whereupon he said: It is something disgusting. 'Abdullah b. Ubayy heard it and said: They have indeed done it. By Allah, when we would return to Medina the respectable amongst them (the Ansar) would turn away the mean (the emigrants). Thereupon 'Umar said: Permit me so that I should strike the neck of this hypocrite. But he (the Holy Prophet) said: Leave him, the people may not say that Muhammad kills his companions.

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَزُهَيْرُ بْنُ حَرْبٍ، وَأَحْمَدُ بْنُ عَبْدَةَ الضَّبِّيُّ، وَابْنُ أَبِي، عُمَرَ - وَاللَّفْظُ لاِبْنِ أَبِي شَيْبَةَ - قَالَ ابْنُ عَبْدَةَ أَخْبَرَنَا وَقَالَ الآخَرُونَ، حَدَّثَنَا سُفْيَانُ بْنُ، عُيَيْنَةَ قَالَ سَمِعَ عَمْرٌو، جَابِرَ بْنَ عَبْدِ اللَّهِ يَقُولُ كُنَّا مَعَ النَّبِيِّ ﷺ فِي غَزَاةٍ فَكَسَعَ رَجُلٌ مِنَ الْمُهَاجِرِينَ رَجُلاً مِنَ الأَنْصَارِ فَقَالَ الأَنْصَارِيُّ يَا لَلأَنْصَارِ وَقَالَ الْمُهَاجِرِيُّ يَا لَلْمُهَاجِرِينَ . فَقَالَ رَسُولُ اللَّهِ ﷺ " مَا بَالُ دَعْوَى الْجَاهِلِيَّةِ " . قَالُوا يَا رَسُولَ اللَّهِ كَسَعَ رَجُلٌ مِنَ الْمُهَاجِرِينَ رَجُلاً مِنَ الأَنْصَارِ . فَقَالَ " دَعُوهَا فَإِنَّهَا مُنْتِنَةٌ " . فَسَمِعَهَا عَبْدُ اللَّهِ بْنُ أُبَىٍّ فَقَالَ قَدْ فَعَلُوهَا وَاللَّهِ لَئِنْ رَجَعْنَا إِلَى الْمَدِينَةِ لَيُخْرِجَنَّ الأَعَزُّ مِنْهَا الأَذَلَّ . قَالَ عُمَرُ دَعْنِي أَضْرِبْ عُنُقَ هَذَا الْمُنَافِقِ فَقَالَ " دَعْهُ لاَ يَتَحَدَّثُ النَّاسُ أَنَّ مُحَمَّدًا يَقْتُلُ أَصْحَابَهُ " .