What is the ruling on money obtained from the draws of "Mashreq Millionaire" in a usurious bank, knowing that the depositor does not lose their principal but rather gains many times what they deposited, and the source of the money resulting from the draws is unknown?

It is not permissible to deal with the aforementioned bank for two reasons:

1. The bank is usurious (Riba-based), and dealing with it involves cooperation in sin and transgression, which is forbidden by the Almighty's saying: (And do not cooperate in sin and transgression).

2. The transaction itself is gambling and usury (Riba); it is usury because it is likely to bring benefit to the depositor, and it is gambling because the participant in it fluctuates between gain and loss.