عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِنَّ اللَّهَ عَزَّ وَجَلَّ وَمَلَائِكَتَهُ عَلَيْهِمُ السَّلَامُ يُصَلُّونَ عَلَى الَّذِينَ يَصِلُونَ الصُّفُوفَ، وَمَنْ سَدَّ فُرْجَةً رَفَعَهُ اللَّهُ بِهَا دَرَجَةً))
It is narrated from Sayyidah Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: Indeed, Allah Almighty and His angels send mercy upon those who join the rows, and whoever fills a gap in the row, Allah raises his rank by one degree.