Arabic (Original)
حَدَّثَنَا وَكِيعٌ حَدَّثَنَا شُعْبَةُ عَنْ قَتَادَةَ عَنْ أَنَسِ بْنِ مَالِكٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ أَتِمُّوا صُفُوفَكُمْ فَإِنَّ تَسْوِيَةَ الصَّفِّ يَعْنِي مِنْ تَمَامِ الصَّلَاةِ.
English Translation
The Messenger of Allah (peace be upon him) said: 'Straighten your rows, for I can see you from behind my back.' Each of us would press his shoulder against his companion's shoulder, and his foot against his companion's foot.