Quran

 2:230

فَإِنْ طَلَّقَهَا فَلَا تَحِلُّ لَهُ مِنْ بَعْدُ حَتَّىٰ تَنْكِحَ زَوْجًا غَيْرَهُ ۗ فَإِنْ طَلَّقَهَا فَلَا جُنَاحَ عَلَيْهِمَا أَنْ يَتَرَاجَعَا إِنْ ظَنَّا أَنْ يُقِيمَا حُدُودَ اللَّهِ ۗ وَتِلْكَ حُدُودُ اللَّهِ يُبَيِّنُهَا لِقَوْمٍ يَعْلَمُونَ ﴿٢٣٠﴾

230. If he divorces her, she is no longer lawful for him, until she marries another man. If he divorces her, then there is no blame on them for reuniting, provided they think they can maintain Allah's limits. These are the limits set by Allah; He makes them clear to people who know.