Hazrat Abu Sa'id Khudri (may Allah be pleased with him) narrates from Hazrat Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) appointed a man as a collector in Khaybar. That person brought a high-quality type of date. The Messenger of Allah (peace and blessings be upon him) inquired whether all the dates of Khaybar were of this kind. He replied, "No, by Allah, O Messenger of Allah! We buy one sa’ of these dates by giving two sa’ of inferior dates, and sometimes we take two sa’ in exchange for three sa’." The Prophet (peace and blessings be upon him) said, "Do not do so. Instead, sell the inferior dates first and then buy the good quality dates with that money."