An Nahl Ayah 92

وَلَا تَكُونُواْ كَٱلَّتِى نَقَضَتْ غَزْلَهَا مِنۢ بَعْدِ قُوَّةٍ أَنكَـٰثًا تَتَّخِذُونَ أَيْمَـٰنَكُمْ دَخَلاَۢ بَيْنَكُمْ أَن تَكُونَ أُمَّةٌ هِىَ أَرْبَىٰ مِنْ أُمَّةٍ‌ۚ إِنَّمَا يَبْلُوكُمُ ٱللَّهُ بِهِۦ‌ۚ وَلَيُبَيِّنَنَّ لَكُمْ يَوْمَ ٱلْقِيَـٰمَةِ مَا كُنتُمْ فِيهِ تَخْتَلِفُونَ ٩٢ Do not be like the woman who ?foolishly? unravels her yarn after it is firmly spun, by taking your oaths as a means of deceiving one another in favour of a stronger group. Surely Allah tests you through this. And on the Day of Judgment He will certainly make your differences clear to you.