Collective strength

وَٱلَّذِينَ كَفَرُوا۟ بَعْضُهُمْ أَوْلِيَآءُ بَعْضٍ ۚ إِلَّا تَفْعَلُوهُ تَكُن فِتْنَةٌ فِى ٱلْأَرْضِ وَفَسَادٌ كَبِيرٌ

And those who disbelieved are allies of one another. If you do not do so [i.e., ally yourselves with other believers], there will be fitnah [i.e., disbelief and oppression] on earth and great corruption.

أَمْ يَقُولُونَ نَحْنُ جَمِيعٌ مُّنتَصِرٌ

Or do they say, "We are an assembly supporting [each other]"?

إِنَّ ٱللَّهَ يُحِبُّ ٱلَّذِينَ يُقَـٰتِلُونَ فِى سَبِيلِهِۦ صَفًّا كَأَنَّهُم بُنْيَـٰنٌ مَّرْصُوصٌ

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