الصّفّ — As-Saff Ayat 4

اِنَّ اللّٰهَ يُحِبُّ الَّذِيْنَ يُقَاتِلُوْنَ فِيْ سَبِيْلِهٖ صَفًّا كَاَنَّهُمْ بُنْيَانٌ مَّرْصُوْصٌ

Innallāha yuḥibbul-lażīna yuqātilūna fī sabīlihī ṣaffan ka'annahum bun-yānum marṣūṣ(un).

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