I asked Ibn ʿUmar about Salam (the fruits of) date-palms. He replied, "The Prophet ﷺ forbade the sale of dates till their benefit becomes evident and fit for eating and also the sale of silver (for gold) on credit." I asked Ibn ʿAbbas about Salam for dates and he replied, "The Prophet ﷺ forbade the sale of dates till they were fit for eating and could be estimated."  

نَهَى النَّبِيُّ ﷺ عَنْ بَيْعِ النَّخْلِ حَتَّى يُؤْكَلَ مِنْهُ أَوْ يَأْكُلَ مِنْهُ وَحَتَّى يُوزَنَ  

I asked Ibn ʿUmar about Salam for dates. Ibn ʿUmar replied, "The Prophet ﷺ forbade the sale (the fruits) of date-palms until they were fit for eating and also forbade the sale of silver for gold on credit." I also asked Ibn ʿAbbas about it. Ibn ʿAbbas replied, "The Prophet ﷺ forbade the sale of dates till they were fit for eating, and could be weighed." I asked him, "What is to be weighed (as the dates are on the trees)?" A man sitting by Ibn ʿAbbas said, "It means till they are cut and stored."  

نَهَى النَّبِيُّ ﷺ عَنْ بَيْعِ الثَّمَرِ حَتَّى يَصْلُحَ وَنَهَى عَنِ الْوَرِقِ بِالذَّهَبِ نَسَاءً بِنَاجِزٍ وَسَأَلْتُ ابْنَ عَبَّاسٍ فَقَالَ نَهَى النَّبِيُّ ﷺ عَنْ بَيْعِ النَّخْلِ حَتَّى يَأْكُلَ أَوْ يُؤْكَلَ وَحَتَّى يُوزَنَ قُلْتُ وَمَا يُوزَنُ قَالَ رَجُلٌ عِنْدَهُ حَتَّى يُحْرَزَ