What is the ruling on depositing money in savings accounts and deposits in Islamic banks and benefiting from their profits, and what is the method of lawful earning from Islamic banks and joint-stock companies, and is it permissible to specify a percentage for profit or a monthly amount?

It is permissible to deal with Islamic banks, deposit funds in them, and invest them in savings accounts. The profits derived therefrom are also permissible, as long as the bank's transactions adhere to the rulings of Islamic Sharia. This can be verified by inquiring with the bank's Sharia Supervisory Board or by asking trustworthy scholars about the bank. A sound Mudarabah (profit-sharing partnership) is based on a known share of the profit.