Is the father obligated to register 17 feddans out of the remaining 20 feddans to his children, knowing that he inherited 3 feddans and owned 30 feddans, and previously registered 10 feddans to his children, and all his children are married and live with him?

A father must be equitable between sons and daughters in giving gifts, due to the saying of the Prophet, peace and blessings be upon him: "Fear Allah and be just among your children," and his saying: "Be equitable among your children in giving gifts; if I were to prefer anyone, I would prefer women." Therefore, it is not permissible for him to write over some of his possessions to his sons while abandoning his daughters, and what he did by writing over to some of them is considered void and must be reversed.