Sunan an-Nasa'i
Sunan an-Nasa'i 810
أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ أَنْبَأَنَا أَبُو الأَحْوَصِ، عَنْ سِمَاكٍ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُقَوِّمُ الصُّفُوفَ كَمَا تُقَوَّمُ الْقِدَاحُ فَأَبْصَرَ رَجُلاً خَارِجًا صَدْرُهُ مِنَ الصَّفِّ فَلَقَدْ رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " لَتُقِيمُنَّ صُفُوفَكُمْ أَوْ لَيُخَالِفَنَّ اللَّهُ بَيْنَ وُجُوهِكُمْ " .
Qutaybah ibn Sa‘id informed us: Abu Al-Ahwas informed us from Simak, from An-Nu‘man ibn Bashir, who said: The Messenger of Allah ﷺ used to straighten the rows as arrows are straightened. He saw a man whose chest protruded beyond the row. I saw the Prophet ﷺ say, 'You must straighten your rows, or Allah will cause discord among you.'
Translation notes
The final phrase literally refers to Allah causing your faces to differ; it is rendered here as discord among you.