What is the best solution for dealing with money from the shares of a usurious bank owned by the father who refuses to sell them; should it be taken for marriage, or should it be left while the father persists in his stubbornness?

It is not permissible for the father to sell prohibited shares. He must revoke the contract with the bank and return the shares if possible. If not possible, then the proportion of the prohibited transaction from the profits must be extracted and spent on the welfare of Muslims, such as the poor and the needy. If the son is in need of marriage, it is permissible for the father to give him from this prohibited money, as it is one of its designated expenditures. It is advised to be dutiful to the father, to treat him gently, and to advise him with the Islamic ruling.