How is the Kuwaiti Dinar debt paid in Syrian Pounds if the exchange rate in Syria is lower than in Kuwait?

If a man borrows money in dinars, and he authorizes the debtor to exchange it for liras and deliver it to his family, then the debt must be repaid in dinars. If the lender agrees to be repaid in another currency (such as liras), there is no objection, provided that it is at the exchange rate on the day of repayment, and that they do not part ways while anything is outstanding between them. If the exchange rate varies between countries, the rate of the country where the loan was contracted is to be considered, which in this case is Syria.