Is it permissible to write a will by which properties are transferred to the wife and children after death, for fear that the eldest brother might seize their share, especially since he threatens to prevent the eldest sister from her inheritance?

What the father leaves behind as inheritance is a right for all his heirs according to their legal shares. No one has the right to claim sole possession of any part of it before its division, or to take an additional share, except with the consent of the remaining adult, sound-minded heirs. Therefore, the estate must be divided according to Allah's ordinances. If a dispute arises, it should be referred to the Sharia court.

As for writing a will to distribute money to the wife and daughters after death, it is not valid and serves no purpose unless all adult, sound-minded heirs agree, due to the Prophet (peace be upon him) saying: "Indeed, Allah has given every rightful person his right, so there is no will for an heir," and "A will for an heir is not permissible, unless the heirs wish it."

Children should be harmonious and not turn their backs on each other, and they should maintain kinship ties even with those who sever them, as the Prophet (peace be upon him) said: "The one who maintains ties is not the one who reciprocates, but the one who, when his kinship ties are severed, reconnects them," and "You will always have a supporter from Allah against them as long as you remain steadfast in that." The righteous should strive to reconcile relatives, as it is among the best deeds in the sight of Allah, for the Prophet (peace be upon him) said: "Shall I not inform you of something better than the degree of fasting, prayer, and charity?" They said, "Yes." He said, "Reconciling disputes among people, for indeed, discord among people is a shaver."