كتاب البيوع
21  
The Book of Transactions
(14)
Chapter: The prohibition of selling fresh dates in exchange for dry dates except in the case of 'Araya
(14)
باب تَحْرِيمِ بَيْعِ الرُّطَبِ بِالتَّمْرِ إِلاَّ فِي الْعَرَايَا ‏‏
Sahih Muslim 1540 a

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 ‏.‏
Reference : Sahih Muslim 1540a
In-book reference : Book 21, Hadith 86
USC-MSA web (English) reference : Book 10, Hadith 3687
  (deprecated numbering scheme)