It was narrated that 'Abduilah bin 'Umar said:"The Messenger of Allah (ﷺ) forbade the Muzabanah. The Muzdbanah means when a man sells the dates of his grove when they are still on the tree, for a measure of dty dates;[2] or, if it is grapes, he sells them when they are still on the vine, for a measure of raisins; or if it is a crop, he sells it for food, estimating the amount (of the crop in the field). He forbade all of these things."
حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ، أَنْبَأَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، قَالَ نَهَى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَنِ الْمُزَابَنَةِ . وَالْمُزَابَنَةُ أَنْ يَبِيعَ الرَّجُلُ تَمْرَ حَائِطِهِ إِنْ كَانَتْ نَخْلاً بِتَمْرٍ كَيْلاً وَإِنْ كَانَتْ كَرْمًا أَنْ يَبِيعَهُ بِزَبِيبٍ كَيْلاً وَإِنْ كَانَتْ زَرْعًا أَنْ يَبِيعَهُ بِكَيْلِ طَعَامٍ نَهَى عَنْ ذَلِكَ كُلِّهِ .
IbnMaja
The Chapters on Business Transactions • Hadith 2265