عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنِ الْمُحَاقَلَةِ وَهُوَ اشْتِرَاءُ الزَّرْعِ وَهُوَ فِي سُنْبُلِهِ بِالْحِنْطَةِ وَنَهَى عَنِ الْمُزَابَنَةِ وَهُوَ شِرَاءُ الثِّمَارِ بِالتَّمْرِ
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade Muhaqala and Muzabana. Muhaqala is when the grain in the ears of a crop is sold in exchange for wheat, and Muzabana is when the fruit on a tree is sold in exchange for dates.