Q: What is the meaning of
'a debt for debt sale'?
Is it applied to selling a commodity bought on credit to another on credit before paying its price?
A debt for debt sale means a delay for delay sale; it is not permissible. It takes several forms: (I) Selling the debt i.e. Prices or goods, to the same debtor or another for a deferred payment. (Part No. 13; Page No. 340) (II) Selling the capital paid in advance for Salam (sale with advance payment) sale e.g. The buyer pays one hundred dirhams as a price of some food and the like to be delivered after a year. When the delivery date is due, the other party may say: "I do not have food to give you but you can sell me the food for two hundred dirhams to be paid after a month or so".As for selling the commodities you have in your possession for a deferred payment before paying their price, it does not fall under the debt for debt sale, as you are just selling a commodity that you have bought and had in your possession.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.