Is it permissible to marry a man who works at Faisal Bank, knowing that the bank deals with treasury bills and usurious bonds issued by the Central Bank, and that the suitor is a department manager whose work is not related to these usurious transactions, and that the bank is an Islamic bank based on the Mudarabah system and sells goods with interest?

Treasury bills and bonds are Islamically forbidden because they are usurious loans. Calling them investment certificates or sukuk (definition), or calling the interest profit, does not change their ruling. Faysal Bank is one of the well-known Islamic banks, and it is not forbidden to deal with it despite the presence of some Sharia (definition) non-compliances in its transactions. A percentage of the profit, equivalent to the forbidden percentage, must be given out. It is permissible to work in Islamic banks whose transactions might sometimes violate Sharia, provided one avoids forbidden transactions and does not assist in them, unlike usurious banks where working is absolutely forbidden. Based on this, there is no harm in accepting the young man as a suitor if his work is not related to treasury bills or any forbidden transaction, and he does not assist in it.