Al-'Anfāl 8:73 · سُورَةُ الأنفال

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

wa-alladhīna kafarū baʿḍuhum awliyāu baʿḍin illā tafʿalūhu takun fit'natun fī l-arḍi wafasādun kabīrun

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.

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