عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: إِنِّي أَنْظُرُ أَوْ إِنِّي لَأَنْظُرُ مَا وَرَاءِي كَمَا أَنْظُرُ إِلَى مَا بَيْنَ يَدَيَّ، فَسَوُّوا صُفُوفَكُمْ وَأَحْسِنُوا رُكُوعَكُمْ وَسُجُودَكُمْ
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Surely, I see behind me just as I see in front of me, so keep your rows straight and perform bowing and prostration in a good manner.