إِنَّ اللَّهَ يُحِبُّ الَّذِينَ يُقَاتِلُونَ فِي سَبِيلِهِ صَفًّا كَأَنَّهُمْ بُنْيَانٌ مَرْصُوصٌ

Surah As-Saf : 4
Indeed, Allah loves those who fight in His cause in a row as though they are a [single] structure joined firmly.

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