Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Prophet Muhammad (peace and blessings be upon him) said: "Whoever buys any grain should not sell it until he has taken full possession of it." The narrator states: The Prophet Muhammad (peace and blessings be upon him) forbade a person from selling it before transferring it to another place. (The narrator is unsure about one word here.)
Hadith Referenceصحیح ابن حبان / كتاب البيوع / 4986
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الإرواء» (1328)، «البيوع»: ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط الشيخين