Hadith 82

Bulugh al-Maram

Book 7: Business Transactions
وَلِمُسْلِمٍ: { رَخَّصَ فِي اَلْعَرِيَّةِ يَأْخُذُهَا أَهْلُ اَلْبَيْتِ بِخَرْصِهَا تَمْرًا، يَأْكُلُونَهَا رُطَبًا } 1‏ .‏
Muslim has:

"He gave permission regarding al-'Araya (for its sale) in which the household buys its fruit on the basis of a calculation (of what the dates would be when dry), yet they could eat them fresh (from the tree).