Narrator:An-Nu‘mān ibn Bashīr
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ سِمَاكِ بْنِ حَرْبٍ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُسَوِّي صُفُوفَنَا فَخَرَجَ يَوْمًا فَرَأَى رَجُلاً خَارِجًا صَدْرُهُ عَنِ الْقَوْمِ فَقَالَ
" لَتُسَوُّنَّ صُفُوفَكُمْ أَوْ لَيُخَالِفَنَّ اللَّهُ بَيْنَ وُجُوهِكُمْ "
An-Nu'man bin Bashir said:
"Allah's Messenger would straighten our lines. One day he came out and saw a man whose chest was protruding from the people, so he said: 'You must straighten your lines, or Allah will cause disagreement to occur among your faces."
Reported by At-Tirmidhi (No. 227), Al-Bukhari (No. 717), Muslim (No. 436a, 436b, 436c), Abu Dawud (No. 662, 663), An-Nasa’i (No. 810), Ibn Majah (No. 994) and Ahmad (No. 17663, 17674, 17700, 17703, 17713).