The Ruling on Working in Banks

Question:
A brother of mine works in one of the banks, and his job is only to take money from people and deposit it in the vault, or to disburse money from the vault, along with preparing the bills for water, electricity, and telephone. I advised him to leave this job, but he says, "I do not deal in riba (usury or interest), and I do not eat riba." What is the ruling on his work?

Answer:
The ruling on his work is that it is not permissible, because he is cooperating with the bank. He is cooperating with the bank, just as they say that the doorman who guards the door is cooperating with the bank, and the janitor, the driver, and the bank—all of them are cooperating. The Messenger (peace and blessings be upon him) cursed the one who eats riba, the one who gives it, the two witnesses, and the two scribes. Why did he curse the witness and the scribe? Even though he is one of those who cooperate with the officer? The one who serves the bank in any type of job, whether official or otherwise, is considered to be cooperating in sin and aggression. Jobs, praise be to Allah, are plentiful in fields other than banks. Work is plentiful: buying and selling, seeking a livelihood—there is plenty of seeking a livelihood in fields other than this. Yes.