Is changing a property division agreement made 15 years ago—where I have two shares and each of my sons has one share, out of a total of eight shares—after the sons demanded its annulment or amendment, an injustice to the daughters' right to inheritance? Or does the continuation of the agreement oppress the sons and their working children?

It is not permissible for a father to allocate inheritance or gifts exclusively to male children. Rather, he must be just among all his children, male and female, by giving the male twice what the female receives. This act is considered a practice of the pre-Islamic era (Jahiliyyah), and the Prophet, peace and blessings be upon him, forbade it. If the father has favored male children only, he is obligated to reclaim the money and re-distribute it justly, even if a long time has passed. As for funds resulting from a joint venture between the father and his children, they are considered a partnership among them, and the father's share in it must be fairly determined with the help of experts.