Bashair b. Yasir reported on the authority of some of the Companions of Allah's Messenger (ﷺ) among the members of his family among whom one was Sahl b. Abu Hathma that Allah's Messenger (ﷺ) forbade buying of fresh dates against dry dates and that it is Riba and this is Muzabana, but he made an exemption of 'ariyya (donations) of a tree or two in which case the members of a family sell dry dates and buy fresh dates for eating them.
وَحَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، حَدَّثَنَا سُلَيْمَانُ، - يَعْنِي ابْنَ بِلاَلٍ - عَنْ يَحْيَى، - وَهُوَ ابْنُ سَعِيدٍ - عَنْ بُشَيْرِ بْنِ يَسَارٍ، عَنْ بَعْضِ، أَصْحَابِ رَسُولِ اللَّهِ صلى الله عليه وسلم مِنْ أَهْلِ دَارِهِمْ مِنْهُمْ سَهْلُ بْنُ أَبِي حَثْمَةَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ بَيْعِ الثَّمَرِ بِالتَّمْرِ وَقَالَ " ذَلِكَ الرِّبَا تِلْكَ الْمُزَابَنَةُ " . إِلاَّ أَنَّهُ رَخَّصَ فِي بَيْعِ الْعَرِيَّةِ النَّخْلَةِ وَالنَّخْلَتَيْنِ يَأْخُذُهَا أَهْلُ الْبَيْتِ بِخَرْصِهَا تَمْرًا يَأْكُلُونَهَا رُطَبًا .
Muslim
The Book of Transactions • Hadith 86