Messenger of Allah ﷺ appointed somebody as a governor of Khaibar. That governor brought to him an excellent kind of dates (from Khaibar). The Prophet ﷺ asked, "Are all the dates of Khaibar like this?" He replied, "By Allah, no, O Messenger of Allah ﷺ! But we barter one Sa of this (type of dates) for two Sas of dates of ours and two Sas of it for three of ours." Messenger of Allah ﷺ said, "Do not do so (as that is a kind of usury) but sell the mixed dates (of inferior quality) for money, and then buy good dates with that money." (Using translation from Bukhārī 2201)  

أَنَّ رَسُولَ اللهِ ﷺ اسْتَعْمَلَ رَجُلًا عَلَى خَيْبَرَ فَجَاءَ بِتَمْرٍ جَنِيبٍ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ «أَكُلُّ تَمْرِ خَيْبَرَ هَكَذَا؟» قَالَ لَا وَاللهِ يَا رَسُولَ اللهِ إِنَّا لَنَأْخُذُ الصَّاعَ مِنْ هَذَا بِالصَّاعَيْنِ وَالصَّاعَيْنِ بِالثَّلَاثَةِ فَقَالَ رَسُولُ اللهِ ﷺ «لَا تَفْعَلْ بِعِ الْجَمْعَ بِالدَّرَاهِمِ ثُمَّ ابْتَعْ بِالدَّرَاهِمِ جَنِيبًا»  

some dates from trees that were irrigated artificially were brought to the Messenger of Allah and the dates of the messenger of Allah were dates from trees that were nourished by their roots. He said: "Where did you get these from?" They said: "We bought a Sa of them for two Sa s of our dates: He said: "Do not do that, for this is not right. Rather sell your dates and but what you need of these," (Using translation from Nasāʾī 4554)  

أَنَّ رَسُولَ اللهِ ﷺ أُتِيَ بِتَمْرٍ رَيَّانَ وَكَانَ تَمْرُ رَسُولِ اللهِ ﷺ بَعْلًا فِيهِ يُبْسٌ قَالَ «أَنَّى لَكُمْ هَذَا؟» قَالُوا ابْتَعْنَاهُ صَاعًا بِصَاعَيْنِ مِنْ تَمْرِنَا فَقَالَ «لَا تَفْعَلْ فَإِنَّ هَذَا لَا يَصْلُحُ بِعْ تَمْرَكَ وَاشْتَرِ مِنْ هَذَا حَاجَتَكَ»  

"We used to be given mixed dates during the time of the Messenger of Allah and we would sell two Sa s for one Sa News of that reached the Messenger of Allah and he said Do not sell) two Sa s of dates for a Sa, or two Sa s of wheat for s Sa or a Dirham for two Dirhams. ," (Using translation from Nasāʾī 4555)  

كُنَّا نُرْزَقُ تَمْرَ الْجَمْعِ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ فَنَبِيعُ الصَّاعَيْنِ بِالصَّاعِ فَبَلَغَ ذَلِكَ رَسُولَ اللهِ ﷺ فَقَالَ «لَا صَاعَيْ تَمْرٍ بِصَاعٍ وَلَا صَاعَيْ حِنْطَةٍ بِصَاعٍ وَلَا دِرْهَمًا بِدِرْهَمَيْنِ»  

"We used to sell two Sa s of mixed dates for a Sa but the Prophet said (Do not sell) two Sa s dates for a Sa or two Sa s wheat or a Sa or two Dirhams for a Dirham. ," (Using translation from Nasāʾī 4556)   

النَّبِيُّ ﷺ «لَا صَاعَيْ تَمْرٍ بِصَاعٍ وَلَا صَاعَيْ حِنْطَةٍ بِصَاعٍ وَلَا دِرْهَمَيْنِ بِدِرْهَمٍ»  

"Bilal brought some Bami dates to the Messenger of Allah and he said: 'What is this? 'He said: 'I bought a Sa of them for two Sas. The Messenger of Allah said: "O! The essence of Riba, do not approach it."' (Using translation from Nasāʾī 4557)  

أَتَى بِلَالٌ رَسُولَ اللهِ ﷺ بِتَمْرٍ بَرْنِيٍّ فَقَالَ «مَا هَذَا؟» فَقَالَ اشْتَرَيْتَهُ صَاعًا بِصَاعَيْنِ فَقَالَ رَسُولُ اللهِ ﷺ «أَوِّهْ عَيْنُ الرِّبَا لَا تَقْرَبْهُ»