What is the ruling on donating a kidney to a patient suffering from chronic kidney failure in exchange for money, and what is the ruling on donating it if the donor is a family member and without compensation?

The ruling on organ transplantation and donation has previously been addressed, stating that there is no objection to it, subject to specific controls and conditions, and that selling an organ is not permissible. It is added here that if a patient is compelled to undergo a kidney transplant and can only obtain it by paying compensation for it, this is permissible for him and he incurs no sin, based on the Almighty’s saying: (He has already explained to you what He has forbidden to you, except what you are compelled to [eat or use]).