As-Saff - 61:4

إِنَّ اللَّهَ يُحِبُّ الَّذِينَ يُقَاتِلُونَ فِي سَبِيلِهِ صَفًّا كَأَنَّهُم بُنيَانٌ مَّرْصُوصٌ
[61:4]
Surely Allah loves those who fight in His way in ranks as if they were a firm and compact wall.
Truly Allah loves those who fight in His Cause in battle array, as if they were a solid cemented structure.
Lo! Allah loveth them who battle for His cause in ranks, as if they were a solid structure.