Abu Sa'id (Allah be pleased with him) reported: Dates were brought to Messenger of Allah ﷺ, and he said: These dates are not like our dates, whereupon a man said: We sold two sa's of our dates (in order to get) one sa', of these (fine dates), whereupon Messenger of Allah ﷺ said: That is interest;
so return (these dates of fine quality), and get your (inferior dates) ;
then sell our dates (for money) and buy for us (with the help of money) such (fine dates).

وَحَدَّثَنَا سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي قَزَعَةَ، الْبَاهِلِيِّ عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ، قَالَ أُتِيَ رَسُولُ اللَّهِ ﷺ بِتَمْرٍ فَقَالَ " مَا هَذَا التَّمْرُ مِنْ تَمْرِنَا " . فَقَالَ الرَّجُلُ يَا رَسُولَ اللَّهِ بِعْنَا تَمْرَنَا صَاعَيْنِ بِصَاعٍ مِنْ هَذَا . فَقَالَ رَسُولُ اللَّهِ ﷺ " هَذَا الرِّبَا فَرُدُّوهُ ثُمَّ بِيعُوا تَمْرَنَا وَاشْتَرُوا لَنَا مِنْ هَذَا " .