Al Anfal Ayah 73
وَٱلَّذِينَ كَفَرُواْ بَعْضُهُمْ أَوْلِيَآءُ بَعْضٍۚ إِلَّا تَفْعَلُوهُ تَكُن فِتْنَةٌ فِى ٱلْأَرْضِ وَفَسَادٌ كَبِيرٌ ٧٣
As for the disbelievers, they are guardians of one another. And unless you ?believers? act likewise, there will be great oppression and corruption in the land.