Is working in a company in which two usurious banks contribute to its capital, and which deals with usurious interest through the sale of lands, permissible or forbidden? What is the ruling on money saved from this work, and how can one dispose of it?

It is permissible to work for the company as long as the work is lawful. The ruling on working for companies whose operations are permissible differs from that of usurious banks. Partnering with a Jew, a Christian, or a usurer is permissible, though disliked, if the money is with the Muslim and they are the one managing it. The employee's earnings are lawful if the company's funds are mixed (lawful and unlawful), provided that the money intended for trade is not from the very essence of unlawful sources.