حَدَّثَنَا وَكِيعٌ عَنْ إِسْرَائِيلَ عَنْ أَبِي إِسْحَاقَ عَنِ النَّجْرَانِيِّ عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ رَجُلَيْنِ تَبَايَعَا عَلَى عَهْدِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَخْلًا قَبْلَ أَنْ تَطْلُعَ الثَّمَرَةُ فَلَمْ تُطْلِعْ شَيْئًا فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى أَيِّ شَيْءٍ تَأْكُلُ مَالَهُ وَنَهَى عَنْ بَيْعِ الثَّمَرِ حَتَّى يَبْدُوَ صَلَاحُهُ
مسند امام احمد بن حنبل · Hadith 5236
It was narrated from Ibn 'Umar that two men made a deal at the time of the Prophet (PBUH) concerning the crops of palm trees before the fruit appeared, then did not produce any yield. The Prophet (PBUH) said: "On what basis do you want to keep his money?" And he forbade selling crops until they have ripened.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020