"Verily! Those who call you from behind the dwellings, most of them have no sense." (V.49:4)
حَدَّثَنَا الْحَسَنُ بْنُ مُحَمَّدٍ، حَدَّثَنَا حَجَّاجٌ، عَنِ ابْنِ جُرَيْجٍ، قَالَ أَخْبَرَنِي ابْنُ أَبِي مُلَيْكَةَ، أَنَّ عَبْدَ اللَّهِ بْنَ الزُّبَيْرِ، أَخْبَرَهُمْ أَنَّهُ، قَدِمَ رَكْبٌ مِنْ بَنِي تَمِيمٍ عَلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ أَبُو بَكْرٍ أَمِّرِ الْقَعْقَاعَ بْنَ مَعْبَدٍ. وَقَالَ عُمَرُ بَلْ أَمِّرِ الأَقْرَعَ بْنَ حَابِسٍ. فَقَالَ أَبُو بَكْرٍ مَا أَرَدْتَ إِلَى ـ أَوْ إِلاَّ ـ خِلاَفِي. فَقَالَ عُمَرُ مَا أَرَدْتُ خِلاَفَكَ. فَتَمَارَيَا حَتَّى ارْتَفَعَتْ أَصْوَاتُهُمَا، فَنَزَلَ فِي ذَلِكَ {يَا أَيُّهَا الَّذِينَ آمَنُوا لاَ تُقَدِّمُوا بَيْنَ يَدَىِ اللَّهِ وَرَسُولِهِ} حَتَّى انْقَضَتِ الآيَةُ.
Narrated `Abdullah bin Az-Zubair: A group of Bani Tamim came to the Prophet (and requested him to appoint a governor for them). Abu Bakr said, "Appoint Al-Qaqa bin Mabad." `Umar said, "Appoint Al-Aqra' bin Habeas." On that Abu Bakr said (to `Umar). "You did not want but to oppose me!" `Umar replied "I did not intend to oppose you!" So both of them argued till their voices grew loud. So the following Verse was revealed: 'O you who believe! Be not forward......' (49.1)