Meluruskan dan merapatkan barisan dalam shalat karena sesungguhnya lurusnya barisan termasuk kesempurnaan shalat
Imam Ahmad : 11807حَدَّثَنَا سُلَيْمَانُ بْنُ حَيَّانَ أَبُو خَالِدٍ عَنْ حُمَيْدٍ عَنْ أَنَسٍ قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُقْبِلُ عَلَيْنَا بِوَجْهِهِ قَبْلَ أَنْ يُكَبِّرَ فَيَقُولُ تَرَاصُّوا وَاعْتَدِلُوا فَإِنِّي أَرَاكُمْ مِنْ وَرَاءِ ظَهْرِي
Narrated to us [Sulaiman bin Hayyan Abu Khalid] from [Humaid] from [Anas] he said: The Messenger of Allah peace and blessings be upon him faced us before he said his takbir, then shouted: "Straighten up and balance your ranks, indeed I can see you from behind my back.