The prohibition of Muhaqalah and Muzabanah and Mukhabarah: and selling produce before its goodness appears, and Mu'awamah: which is selling years in advance Sahih Muslim 1536 j
Translation
Jabir b. Abdullah (Allah be pleased with them) reported that Allah's Messenger (ﷺ) forbade leasing of land, and selling ahead for years and selling of fruits before they become ripe.