Sahih Bukhari

Narrated Abu Al-Bakhtari:I asked Ibn `Umar about Salam for dates. Ibn `Umar replied, ""The Prophet (ﷺ) forbade the sale (of 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 `Abbas about it. Ibn `Abbas 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 `Abbas said, ""It means till they are cut and stored