عَنْ أُبَيِّ بْنِ كَعْبٍ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((الصَّفُّ الْمُقَدَّمُ عَلَى مِثْلِ صَفِّ الْمَلَائِكَةِ وَلَوْ تَعْلَمُونَ فَضِيلَتَهُ لَابْتَدَرْتُمُوهُ))
It is narrated from Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The first row is like the row of angels, and if you knew its virtue, you would hasten towards it.