Salim narrates from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both): The following statement of the Prophet (peace and blessings be upon him) reached him: "Whoever sells a date-palm tree after it has been pollinated, its fruit will belong to the seller, unless the buyer has stipulated otherwise (then the ruling is different). And whoever sells a slave who possesses property, that property will belong to the seller, unless the buyer has stipulated otherwise (then the ruling will be different)."
Hadith Referenceصحیح ابن حبان / كتاب البيوع / 4923
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: ق - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط البخاري