Is the gift that the father gave to his two wives (the first and the second) during his lifetime valid and enforceable, despite the dissatisfaction of the children from the first wife after the father's death?

A man may give his money to whomever he wishes during his lifetime, provided he deals justly between his wives in the giving. If he favors one and the other accepts it, then it is permissible. The paternal half-siblings have no right to revoke their father's gift, for a father has the right to dispose of his wealth as long as it does not harm his heirs, especially since the first wife also received a gift from the father's property. This is a dispute that must be referred to the judiciary for resolution.