What is the ruling on dealing with parents who work in a government bank regarding money, food, housing, clothing, gifts, inheritance, using a car that the father bought, living in an apartment that was bought with a bank loan, and investing their money in permissible shares?

The National Bank of Egypt deals with usury (riba), and working in usurious banks is unlawful (haram (definition)), and their wages are unlawful. If all the parents' money comes from usurious transactions, it is not permissible to benefit from their wealth except in cases of necessity, for necessities permit prohibitions, according to the Almighty's saying: "And He has already explained to you what He has forbidden to you, except what you are compelled to [eat or use]." This applies to inheritance and a car purchased with usury, and it is prohibited to invest these funds in the stock market or elsewhere.