Is it permissible to boycott a father who has not treated one of his children fairly compared to their siblings, and has expelled him from the home while he is in debt and the father does not inquire about him? And is it permissible for the siblings to seize the father's sheep and refuse to give a share to the other siblings, claiming that it is solely from their own labor? And is it permissible to demand reimbursement for a sister's education expenses after her marriage and employment, or to take a piece of land from the mother's property as compensation for these expenses and personal marriage expenses?

The right of a father is great, and disobeying and boycotting him are among the gravest major sins. It is not permissible to boycott a father, no matter how bad his character, in accordance with the Almighty's saying: "And accompany them in [this] world with appropriate kindness." As for the sheep, they are the property of the father, and the children have no right to them except through a gift. After his death, they become part of the inheritance, unless he specifically designated a share for whoever took care of them. As for the expenditure on your sister's education, if it was a donation, it is not permissible to revoke it. If it was not a donation, then it is permissible to demand it from the father if the expenditure was obligatory upon him, or to take it from the mother's inheritance if the sister is an heir. The father marrying off your siblings without a legitimate Sharia-compliant justification is not permissible, and you have the right to claim compensation for what your siblings were given preference in. Filial piety towards one's father and treating him with kindness are among the closest paths to Paradise.