Ahmed buys goods from a supplier. Ahmed has an agreement with the supplier that if he pays the goods bought on credit within 30 days, then he will get

Question

Ahmed buys goods from a supplier. Ahmed has an agreement with the supplier that if he pays the goods bought on credit within 30 days, then he will get a 2.5% settlement discount. Ahmed does not have the cash flow, so Ahmed tells Abdullah he can pay it on his behalf but Abdullah says he will take the 2.5% discount for his own benefit. Ahmed agrees to these terms with Abdullah. Is this permissible?