´It was narrated from Anas bin Malik that:` the Messenger of Allah forbade selling fruits before they ripen. It was said: "O Messenger of Allah what does ripen mean?" he said: 'when they turn red." And the Messenger of Allah said: "What do you think if Allah withholds the fruits (causes it not to ripen), why would any one of you take his brother's wealth?"
Hadith Referenceسنن نسائي / كتاب البيوع / 4530
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه