Is it permissible for a divorced woman who has two children, and whose only provider is her poor father, to deposit her money in banks or the post office to benefit from usurious interest to help her cover their expenses? And is it permissible for her to take the money deposited in her name in savings accounts, which contains usurious gains, when her mother had intended to give it away for the sake of Allah?

It is not permissible to deposit money in interest-based banks because it is haram (definition) (forbidden) and among the greatest of major sins. It is obligatory to invest money through permissible means or to place it in Islamic banks. As for the money that the mother deposited in interest-based savings accounts and wishes to dispose of the usurious increment, it is permissible for her to give it to the questioner if she is in need, bearing in mind that the financial support and medical treatment of young children are the responsibility of their father. If he abstains from fulfilling this, his case can be brought before the Sharia (definition) court.