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.
— Saheeh International
The disbelievers support one another. If you do not do the same, there will be persecution in the land and great corruption.
— M. A. S. Abdel Haleem
And those who disbelieve are allies of one another, (and) if you (Muslims of the whole world collectively) do not do so [i.e. become allies, as one united block under one Khalifah (a chief Muslim ruler for the whole Muslim world) to make victorious Allâh’s religion of Islâmic Monotheism], there will be Fitnah (wars, battles, polytheism) and oppression on the earth, and a great mischief and corruption (appearance of polytheism).
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali