Does the transaction that took place—where a brother took a sum of money to lend to his friend, and the friend gave the brother riyals to hold and sell at a suitable price to repay the debt and keep the remainder, then the questioner bought the riyals at market price, repaid the debt, and delivered the remainder—constitute a suspicion of usury (riba), and if so, how can one absolve themselves of it?

It is permissible to sell Saudi Riyals for Egyptian Pounds if the sale is at the market rate, and the transaction includes settling a debt in another currency and leaving the remaining Riyals as a trust. There is no harm in these two transactions, whether combined or separate, provided that the exchange (qabd) of Riyals and Pounds occurs in the same contractual session. It is also permissible to settle a debt in another currency at the rate of the day of settlement, provided that this was not agreed upon beforehand.