And with this same chain (it is narrated from Sayyiduna Anas, may Allah be pleased with him) that the Messenger of Allah, peace and blessings be upon him, forbade selling fruits before they ripen. It was asked: O Messenger of Allah! What is meant by ripening? He, peace and blessings be upon him, said: "Becoming red." And the Messenger of Allah, peace and blessings be upon him, said: "Tell me, if Allah withholds the fruit, then for what reason would you take your brother's wealth?"

And with the same chain of narration, it is reported from (Sayyiduna Ibn Umar, may Allah be pleased with them both) that the Messenger of Allah, peace and blessings be upon him, forbade both the seller and the buyer from selling and purchasing fruits before they have ripened.