Sahih Bukhari
Sahih Bukhari Voluume 003, Book 050, Hadith Number 881.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 50. Conditions
Narated By Abdullah bin Umar : Allah's Apostle gave the land of Khaibar to the Jews on the condition that they would work on it and cultivate it and they would get half of its yield.