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