All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Borrowing money is not considered purchasing, selling or exchanging, and thus, the prohibition of delaying the payment (of the loan) does not apply to this issue.
Allaah knows best.