Is it permissible to open a savings account in a bank that describes itself as Islamic and benefit from its profits through Mudarabah, knowing that it only deals with institutions?

The ruling on opening a savings account at the Saudi Finance Bank depends on the extent of the bank's adherence to Sharia regulations in its dealings. If it is a usurious bank, then saving in it is forbidden, and the profits generated from it are illicit wealth that must be disposed of by spending it on general Muslim welfare, with the obligation to withdraw the deposit and repent. However, if it is a truly Islamic bank, then there is no objection to saving in it and benefiting from its profits.