Bulugh al-Maram #957

Narrated Abu Sa'id al-Khudri and Abu Hurairah (RA): Allah's Messenger (ﷺ) appointed a man over Khaibar and he brought him dates of a very fine quality. Allah's Messenger (ﷺ) asked, "Are all the dates of Khaibar like this?" He replied, "I swear by Allah that they are certainly not, O Allah's Messenger. We take one Sa' of this kind for two, and even for three (of lesser quality). So Allah's Messenger (ﷺ) said: "Do not do so. Sell the mixed dates for Dirhams, then buy the very fine dates with the Dirhams." And he said that the same applies when things are sold by weight. .