What is the ruling on inherited money that has been mixed with usurious bank interest, and does the full responsibility fall on the executors alone, or does it include all the heirs?

It is impermissible to deposit money in interest-based (riba-based) banks except in cases of extreme necessity, and then only in a current account. Usurious interest must be disposed of by spending it on charitable causes. Inherited wealth that includes usurious interest is permissible for the heirs, because that which is forbidden due to its acquisition – such as usury – is forbidden only for the acquirer, and not for one to whom the money is transferred through a permissible means, such as inheritance. However, if the heirs deposit the money in an interest-based bank after the death of the inheritor, they must dispose of the interest generated therefrom. It is obligatory to advise the siblings to abandon usurious dealings and to dispose of usurious interest.