Al Baqarah Ayah 232

وَإِذَا طَلَّقْتُمُ ٱلنِّسَآءَ فَبَلَغْنَ أَجَلَهُنَّ فَلَا تَعْضُلُوهُنَّ أَن يَنكِحْنَ أَزْوَٲجَهُنَّ إِذَا تَرَٲضَوْاْ بَيْنَهُم بِٱلْمَعْرُوفِ‌ۗ ذَٲلِكَ يُوعَظُ بِهِۦ مَن كَانَ مِنكُمْ يُؤْمِنُ بِٱللَّهِ وَٱلْيَوْمِ ٱلْأَخِرِ‌ۗ ذَٲلِكُمْ أَزْكَىٰ لَكُمْ وَأَطْهَرُ‌ۗ وَٱللَّهُ يَعْلَمُ وَأَنتُمْ لَا تَعْلَمُونَ ٢٣٢ When you have divorced women and they have reached the end of their waiting period, do not prevent them from re-marrying their ex-husbands if they come to an honourable agreement. This is enjoined on whoever has faith in Allah and the Last Day. This is purer and more dignifying for you. Allah knows and you do not know.