Yahya related to me from Malik from Da'ud ibn al-Husayn from AbuSufyan, the mawla of Ibn Abi Ahmad, from Abu Said al-Khudri that theMessenger of Allah, may Allah bless him and grant him peace, forbademuzabana and muhaqala. Muzabana was selling fresh dates for drieddates while they were still on the trees. Muhaqala was renting land inexchange for wheat.
USC-MSA web (English) reference: Book 31, Hadith 24
Arabic reference: Book 31, Hadith 1317