Yahya related to me from Malik from Nafi from Ibn Umar that theMessenger of Allah, may Allah bless him and grant him peace, forbadeselling fruit until it had started to ripen. He forbade thetransaction to both buyer and seller. (DE)
USC-MSA web (English) reference: Book 31, Hadith 10 (DE)
Arabic reference (DE): Book 31, Hadith 1302 (DE)