Al-Baqarah 2:229 الطلاق مرتان فامساك بمعروف او تسريح باحسان ولا يحل لكم ان تاخذوا مما اتيتموهن شييا الا ان يخافا الا يقيما حدود الله فان خفتم الا يقيما حدود الله فلا جناح عليهما فيما افتدت به تلك حدود الله فلا تعتدوها ومن يتعد حدود الله فاولايك هم الظالمون ٢٢٩

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).