What is the ruling on depositing money in a bank and receiving a monthly interest, whether in Islamic banks or conventional banks?

It is better to invest your money yourself if possible; otherwise, deposit it in Islamic banks. It is not permissible to deposit money in commercial banks, whether with interest or without, because they do not adhere to Sharia rulings. Depositing with interest makes its owner a usurer, and depositing without interest is considered assisting them in sin.