What is the ruling on depositing money in Islamic banks through Murabahah?

Perhaps the questioner is referring to investing in Islamic banks through Sharia (definition)-compliant Mudarabah (definition). The answer is that if it is known that the banks adhere to Sharia regulations, then there is no harm in investing money in them through all available investment methods. However, if they are known for leniency (in applying Sharia), then it is not permissible to invest in them. The first thing a person must be keen on is to ensure the lawfulness of their earnings, for by this, their food and drink become wholesome, and their expenses and charities become accepted acts of worship with Allah the Almighty.