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).
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