Surah Al-Baqarah (The Cow), Verse 229

اَلطَّلَاقُ مَرَّتٰنِ فَاِمْسَاكٌ بِمَعْرُوْفٍ اَوْ تَسْرِیْحٌ بِاِحْسَانٍ وَلَا یَحِلُّ لَكُمْ اَنْ تَاْخُذُوْا مِمَّاۤ اٰتَیْتُمُوْهُنَّ شَیْـًٔا اِلَّاۤ اَنْ یَّخَافَاۤ اَلَّا یُقِیْمَا حُدُوْدَ اللّٰهِ فَاِنْ خِفْتُمْ اَلَّا یُقِیْمَا حُدُوْدَ اللّٰهِ فَلَا جُنَاحَ عَلَیْهِمَا فِیْمَا افْتَدَتْ بِهٖ تِلْكَ حُدُوْدُ اللّٰهِ فَلَا تَعْتَدُوْهَا وَمَنْ یَّتَعَدَّ حُدُوْدَ اللّٰهِ فَاُولٰٓىِٕكَ هُمُ الظّٰلِمُوْنَ ۟

Attalaaqu marrataani fa imsaakum bima'roofin aw tasreehum bi ihsaan; wa laa yahillu lakum an taakhuzoo mimmaaa aataitumoohunna shai'an illaaa ai yakhaafaaa alla yuqeemaa hudoodallahi fa in khiftum allaa yuqeemaa hudoodal laahi falaa junaaha 'Alaihimaa feemaf tadat bihee tilka hudoodul laahi falaa ta'tadoohaa; wa mai yata'adda hudoodal laahi fa ulaaa'ika humuzzaa limoon

“A divorce is only permissible twice: after that, the parties should either hold Together on equitable terms, or separate with kindness. It is not lawful for you, (Men), to take back any of your gifts (from your wives), except when both parties fear that they would be unable to keep the limits ordained by Allah. If ye (judges) do indeed fear that they would be unable to keep the limits ordained by Allah, there is no blame on either of them if she give something for her freedom. These are the limits ordained by Allah; so do not transgress them if any do transgress the limits ordained by Allah, such persons wrong (Themselves as well as others).”

Quran 2:229 (Yusuf Ali Translation)