Surah Al-Baqarah, ayah 229

ٱلطَّلَٰقُ مَرَّتَانِۖ فَإِمۡسَاكُۢ بِمَعۡرُوفٍ أَوۡ تَسۡرِيحُۢ بِإِحۡسَٰنٖۗ وَلَا يَحِلُّ لَكُمۡ أَن تَأۡخُذُواْ مِمَّآ ءَاتَيۡتُمُوهُنَّ شَيۡـًٔا إِلَّآ أَن يَخَافَآ أَلَّا يُقِيمَا حُدُودَ ٱللَّهِۖ فَإِنۡ خِفۡتُمۡ أَلَّا يُقِيمَا حُدُودَ ٱللَّهِ فَلَا جُنَاحَ عَلَيۡهِمَا فِيمَا ٱفۡتَدَتۡ بِهِۦۗ تِلۡكَ حُدُودُ ٱللَّهِ فَلَا تَعۡتَدُوهَاۚ وَمَن يَتَعَدَّ حُدُودَ ٱللَّهِ فَأُوْلَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ ٢٢٩

At-talāqu marratāni fa imsāku bima'rūfin aw tasrīhu bi ihsānin walā yahillu lakum an ta'khudhū mimmā ātaytumūhunna shay'an illā an yakhāfā allā yuqīmā hudūdallāhi fa in khiftum allā yuqīmā hudūdallāhi falā junāha 'alayhimā fīmaftadat bihī tilka hudūdullāhi falā ta'tadūhā waman yata'adda hudūdallāhi fa ulā'ika humuz-zālimūn

Divorce is twice. Then [after that], either keep [her] in an acceptable manner or release [her] with good treatment. And it is not lawful for you to take anything of what you have given them unless both fear that they will not be able to keep [within] the limits of Allāh.⁸⁹ But if you fear that they will not keep [within] the limits of Allāh, then there is no blame upon either of them concerning that by which she ransoms herself. These are the limits of Allāh, so do not transgress them. And whoever transgresses the limits of Allāh - it is those who are the wrongdoers [i.e., the unjust].