Allah, Exalted is He, has permitted selling, but deemed Ribaa (i.e., interest, usury) forbidden. In fact, the consumption of Ribaa is one of the major sins and destructive evil deeds and it was deemed forbidden in all the previous divine laws, given the evils and social and economic damages it incurs. In this hadeeth, Aboo Sa’eed Al-Khudree(may Allah be pleased with him) stated that they were given mixed dates (from the spoils of war), which the Messenger of Allah ﷺ used to distribute to Muslims. Such dates were a mixture of various types of date fruits (of different qualities). They used to sell every two Saa‘s (the Saa‘ was a dry measure used for agricultural produce by the Arabs during the Prophet's ﷺlifetime) of such mixed dates, which were of poor quality, for one Saa‘ of good-quality dates. The Saa’ equaled four Mudds, and the Mudd equaled the measure of two open medium-sized handfuls. The Mudd approximately equals (509) grams in the lowest estimate, and (1072) grams in the highest estimate. The Saa’, on the other hand, is equivalent to between 2036 and 4288 grams. The Prophet ﷺ forbade them from such a sale, and told them that it was not permissible to sell two Saa‘s of mixed dates for one Saa‘ of good-quality dates, despite the difference in quality, because the exchanged commodities in this barter would be the same; they were both dates. He ﷺ also forbade them from selling two Dirhams of old or poor-quality silver for one Dirham of good-quality silver because they are of the same kind (silver). This transaction was known as Ribaa Al-Fadhl, which involved an exchange or sale transaction in trade which effectively results in charging ‘interest’ through the exchange of the same commodity, but of a different quality or quantity, and this is prohibited as per the laws of Islam. He ﷺ instructed them instead to sell any given type of date for a monetary value and then buy with that money whatever they wished. Thus, they would avoid taking excess in exchange of a given commodity in the event of a barter of two similar commodities, and the Ribaa involved in such a transaction. It is deduced from the hadeeth that ignorance of a prohibition warrants pardon until one obtains knowledge of it. .