"The Messenger of Allah ﷺ used to straighten the rows like shaft of an arrow is straightened before the head is attached to it. He saw a man whose chest was sticking out from the row. I saw the Messenger of Allah ﷺ say: 'Make your rows straight or Allah will cause your faces to be deformed."  

كَانَ رَسُولُ اللَّهِ ﷺ يُقَوِّمُ الصُّفُوفَ كَمَا تُقَوَّمُ الْقِدَاحُ فَأَبْصَرَ رَجُلاً خَارِجًا صَدْرُهُ مِنَ الصَّفِّ فَلَقَدْ رَأَيْتُ النَّبِيَّ ﷺ يَقُولُ لَتُقِيمُنَّ صُفُوفَكُمْ أَوْ لَيُخَالِفَنَّ اللَّهُ بَيْنَ وُجُوهِكُمْ  

[Machine] I heard him saying that the Prophet ﷺ used to straighten the rows and he saw a man standing outside the row, so he said, "Either you straighten your rows or Allah will cause division among your faces on the Day of Resurrection."  

سَمِعْتُهُ يَقُولُ كَانَ رَسُولُ اللهِ ﷺ يُسَوِّي الصُّفُوفَ فَرَأَى رَجُلًا خَارِجًا مِنَ الصَّفِّ فَقَالَ لَتُقِيمُنَّ صُفُوفَكُمْ أَوْ لَيُخَالِفَنَّ اللهُ بَيْنَ وُجُوهِكُمْ يَوْمَ الْقِيَامَةِ  

"The Messenger of Allah ﷺ used to straighten the rows like shaft of an arrow is straightened before the head is attached to it. He saw a man whose chest was sticking out from the row. I saw the Messenger of Allah ﷺ say: 'Make your rows straight or Allah will cause your faces to be deformed." (Using translation from Nasāʾī 810)   

كَانَ رَسُولُ اللهِ ﷺ يُقَوِّمُ الصُّفُوفَ كَمَا يُقَوَّمُ الْقِدَاحُ فَأَبْصَرَ رَجُلًا يَوْمًا خَارِجًا صَدْرُهُ مِنَ الصَّفِّ فَلَقَدْ رَأَيْتُ النَّبِيَّ ﷺ يَقُولُ لَتُقَوِّمُنَّ صُفُوفَكُمْ أَوْ لَيُخَالِفَنَّ اللهُ بَيْنَ وُجُوهِكُمْ