Is it permissible to benefit from the interest earned on money deposited in a usurious bank through the family court, and what should be done with the usurious surplus that has accumulated over the years?

The usurious increase can amount to large sums, and it is a usurious increase that must be disposed of by giving it to Muslim welfare causes or to the poor and needy. It is not permissible for the one who possesses it to benefit from it for himself, unless he is poor and in need, in which case it is permissible for him to take from it what suffices his need.