Yahya related to me from Malik from Nafi from Abdullah ibn Umarthat the Messenger of Allah, may Allah bless him and grant him peace,said, "If palm trees are sold after they have been pollinated, thefruit belongs to the seller unless the buyer makes a stipulation aboutits inclusion."
USC-MSA web (English) reference: Book 31, Hadith 9
Arabic reference: Book 31, Hadith 1301