It was narrated from Salim bin 'Abdullah bin 'Umar, from Ibn 'Umar, that the Messenger of Allah P.B.U.H said: "Whoever sells a palm tree that has been pollinated, its fruits belong to the seller, unless the purchaser stipulated a condition. And whoever buys a slave who has wealth, his wealth belongs to the seller, unless the purchaser stipulated a condition." (Sahih)