the divorce is twice after that either you retain her on reasonable terms or release her with kindness. and it is not lawful for you to take back any of your mahr which you have given them except when both parties fear that they would be unable to keep the limits ordained by allah . then if you fear that they would not be able to keep the limits ordained by allah then there is no sin on either of them if she gives back for her alkhul . these are the limits ordained by allah so do not transgress them. and whoever transgresses the limits ordained by allah then such are the zalimun .
الطلاق مرتان فإمساك بمعروف أو تسريح بإحسان ولا يحل لكم أن تأخذوا مما آتيتموهن شيئا إلا أن يخافا ألا يقيما حدود الله فإن خفتم ألا يقيما حدود الله فلا جناح عليهما فيما افتدت به تلك حدود الله فلا تعتدوها ومن يتعد حدود الله فأولئك هم الظالمون