We were given to eat, during the lifetime of Messenger of Allah ﷺ, dates of different qualities mixed together, and we used to sell two sa's of these for one sa, (of fine quality of dates). This reached Messenger of Allah ﷺ, whereupon he said: There should be no exchange of two sa's of (inferior) dates for one sa (of fine dates) and two sa's of (inferior) wheat for one sa' of (fine) wheat. and one dirham for two dirharms. (Using translation from Muslim 1595)
كُنَّا نُرْزَقُ تَمْرَ الْجَمْعِ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ