249 صحيح حديث أَنَسٍ، أَنَّ النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ ، قَالَ: أَقِيمُو الصُّفُوفَ فَإِنِّي أَرَاكُمْ خَلْفَ ظَهْرِي
Sayyiduna Anas (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: "Straighten your rows, for I can see you from behind my back."
Hadith Referenceاللؤلؤ والمرجان / كتاب الصلاة / 249
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 10 كتاب الأذان: 71 باب تسوية الصفوف عند الإقامة وبعدها»
Brief Explanation
Straightening the rows is so important that it was the practice of the Prophet sallallahu alayhi wa sallam, and after him, the Rightly Guided Caliphs radi Allahu anhum as well, that they would not begin the prayer until the rows were completely straightened. In the era of Umar radi Allahu anhu, people were appointed specifically for this purpose, who would arrange the rows. (Raaz)