What is the ruling on working for a company that deals with riba (usury or interest) banks?

Question:
A questioner says: I work for a company that deals with some riba banks. Is there sin in my salary, or is there a doubt (shubhah) in my salary? And what do you advise me?

Answer:
This carries danger. Working for a company that deals with riba is dangerous, so distance yourself from it and seek [a better option].
A sound company or a sound shop is better for him, based on the saying of the Messenger (peace and blessings be upon him) and for the one who fears Allah, the forbidden things become sweet to him in his religion and his life. So you should be cautious for yourself.
And distance yourself from what may occur of riba if the tasks you perform are free from riba, but the company itself may use some funds with other companies. This contains doubt, as mentioned before. Distance yourself from its shares. If money comes to you from it and you believe it uses riba, then extract what you estimate corresponds to what came to you, and distance yourself from it for the safety of your religion and to act in accordance with what is lawful. Leave what causes doubt for what does not cause doubt. Indeed, fear the doubtful matters, for that is the safety of religion and character. Because the transactions of companies rarely use [lawful means], rarely use [lawful means]. Yes.