Sayyiduna Jabir (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Whoever sells a slave who has property, the property belongs to the owner and his debt is also on him, unless the buyer stipulates (otherwise); and whoever sells palm trees after pollinating them, their fruit is his, unless the buyer stipulates (otherwise)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10768