A man paid in advance for a palm-tree. It did not bear fruit that year. They brought their case for decision to the Prophet ﷺ. He said: for which do you make his property lawful? He then said: Do not pay in advance for a palm-tree till they (the fruits) were clearly in good condition.  

أَنَّ رَجُلاً أَسْلَفَ رَجُلاً فِي نَخْلٍ فَلَمْ تُخْرِجْ تِلْكَ السَّنَةَ شَيْئًا فَاخْتَصَمَا إِلَى النَّبِيِّ ﷺ فَقَالَ بِمَ تَسْتَحِلُّ مَالَهُ ارْدُدْ عَلَيْهِ مَالَهُ ثُمَّ قَالَ لاَ تُسْلِفُوا فِي النَّخْلِ حَتَّى يَبْدُوَ صَلاَحُهُ  

[Machine] "A man bought a palm tree from another man, but he did not produce anything that year. So they came together and disputed the matter to the Prophet Muhammad ﷺ . The Prophet Muhammad ﷺ said, 'How will you consider his money lawful? Return his money to him and do not take possession of the palm tree until its goodness becomes apparent.' So I asked the plaintiff, 'What is its goodness?' He said, 'Either it will produce good dates or it will become abundant with leaves.'"  

ابْتَاعَ رَجُلٌ مِنْ رَجُلٍ نَخْلًا فَلَمْ يُخْرِجْ تِلْكَ السَّنَةَ شَيْئًا فَاجْتَمَعَا فَاخْتَصَمَا إِلَى النَّبِيِّ ﷺ فَقَالَ النَّبِيُّ ﷺ بِمَ تَسْتَحِلُّ دَرَاهِمَهُ؟ ارْدُدْ إِلَيْهِ دَرَاهِمَهُ وَلَا تُسْلِمُنَّ فِي نَخْلٍ حَتَّى يَبْدُوَ صَلَاحُهُ فَسَأَلْتُ مَسْرُوقًا مَا صَلَاحُهُ؟ قَالَ يَحْمَارُّ أَوْ يَصْفَارُّ  

" عَنْ ابْنِ عُمَرَ قَالَ: ابْتَاعَ رَجُلٌ مِنْ رَجُلٍ نَخْلًا فَلَمْ يُخْرِج السَّنَةَ شَيئًا، فَاخْتَصَمَا إِلىَ النَّبِىِّ ﷺ فَقَالَ النَّبىُّ ﷺ بِمَ تَسْتَحِلُّ دَرَاهِمَه؟ أُرْدُدْ إلَيهِ دَرَاهِمَهُ، ولا تُسْلِمَنَّ (*): في نَخْلٍ حَتَّى يَبُدوَ صَلاَحُهُ ".