p> Narrated Anas bin Malik
Allah's Messenger (ﷺ) forbade the sale of fruits till they are almost ripe. He was asked what is meant by 'are almost ripe.' He replied, "Till they become red." Allah's Messenger (ﷺ) further said, "If Allah spoiled the fruits, what right would one have to take the money of one's brother (i.e. other people)?"
Narrated Ibn Shihab
If somebody bought fruits before their benefit is evident and then the fruits were spoiled with blights, the loss would be suffered by the owner (not the buyer). Narrated Salim bin 'Abdullah from Ibn Umar: Allah's Messenger (ﷺ) said, "Do not sell or buy fruits before their benefit was evident and do not sell fresh fruits (dates) for dried dates."