Surah As-Saf, Verse 4

إِنَّ ٱللَّهَ يُحِبُّ ٱلَّذِينَ يُقَٰتِلُونَ فِي سَبِيلِهِۦ صَفّٗا كَأَنَّهُم بُنۡيَٰنٞ مَّرۡصُوصٞ٤

inna l-laha yuḥibbu alladhīna yuqātilūna fī sabīlihi ṣaffan ka-annahum bun'yānun marṣūṣun

Indeed, Allāh loves those who fight in His cause in a row as though they are a [single] structure joined firmly.