What is the legal ruling on not acting upon a father's clear will?

A will must be executed if it pertains to a matter permissible by Sharia (definition), especially if it involves the rights of others. However, anything exceeding one-third of the estate, or any bequest to an heir, cannot be enforced without the consent of the other heirs. It is obligatory to promptly execute the will and deliver rights to their rightful owners, based on Allah’s saying: "from after a will which he bequeaths or a debt." If the will is not concerning money, and if it is legitimate, fulfilling it is recommended; otherwise, it is not permissible to fulfill it.