The Messenger of Allah ﷺ used to pass through the row from one side to the other; he used to set out chests and shoulders in order, and say: Do not be irregular. And he would say: Allah and His angels bless those who are near the first rows.
كَانَ رَسُولُ اللَّهِ ﷺ يَتَخَلَّلُ الصَّفَّ مِنْ نَاحِيَةٍ إِلَى نَاحِيَةٍ يَمْسَحُ صُدُورَنَا وَمَنَاكِبَنَا وَيَقُولُ لاَ تَخْتَلِفُوا فَتَخْتَلِفَ قُلُوبُكُمْ وَكَانَ يَقُولُ إِنَّ اللَّهَ وَمَلاَئِكَتَهُ يُصَلُّونَ عَلَى الصُّفُوفِ الأُوَلِ