Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) said: "Whoever sells a slave who has property, the property belongs to the first owner, unless the buyer stipulates (otherwise). And whoever sells palm trees after they have been pollinated, their fruit belongs to the first owner, unless the buyer stipulates (otherwise)."
This is munqati' (broken chain).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10767