يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا تَتَّخِذُواْ بِطَانَةٗ مِّن دُونِكُمۡ لَا يَأۡلُونَكُمۡ خَبَالٗا وَدُّواْ مَا عَنِتُّمۡ قَدۡ بَدَتِ ٱلۡبَغۡضَآءُ مِنۡ أَفۡوَٰهِهِمۡ وَمَا تُخۡفِي صُدُورُهُمۡ أَكۡبَرُۚ قَدۡ بَيَّنَّا لَكُمُ ٱلۡأٓيَٰتِۖ إِن كُنتُمۡ تَعۡقِلُونَ
Yaaa ayyuhal lazeena aamanoo laa tattakhizoo bitaanatam min doonikum laa ya'loonakum khabaalanw waddoo maa 'anittum qad badatil baghdaaa'u min afwaahihim; wa maa tukhfee sudooruhum akbar; qad baiyannaa lakumul Aayaati in kuntum ta'qiloon
O ye who believe! Take not into your intimacy those outside your ranks: They will not fail to corrupt you. They only desire your ruin: Rank hatred has already appeared from their mouths: What their hearts conceal is far worse. We have made plain to you the Signs, if ye have wisdom.
— Aali Imran (آلِ عِمْرَان), 3:118