Is it permissible for a wife to take from the Zakat money her husband asks her to disburse – knowing that some of it is from bank interest – to spend on herself and her children without his knowledge, given that he is stingy and negligent in providing for them despite his financial ability?

The husband must repent from dealing with usurious banks. He must dispose of the usurious interest by spending it on the welfare of Muslims or on the poor and needy. It is not permissible for him to pay zakat from it. It is not permissible for the wife to take from the zakat entrusted to her for distribution for her personal needs or the needs of her children, because their maintenance is obligatory upon the husband.

It is permissible for the wife to take zakat from her husband's wealth to cover the expenses of her treatment if she does not possess enough for the treatment and her husband is unable to cover those expenses. This is permissible even without his knowledge. However, if the wife's treatment is obligatory upon the husband, then it is not permissible for her to take from his zakat. If the husband does not spend according to what is customary, then it is permissible for the wife to take her maintenance and the maintenance of her children from his wealth without his knowledge, provided that she does not exceed what is necessary.