Sahih Bukhari Voluume 003, Book 050, Hadith Number 880.
Narated By Abu Huraira : The Ansar said to the Prophet, "Divide our date-palms between us and our emigrant brothers." The Prophet said, "No." The Ansar said to the emigrants, "You may do the labor (in our gardens) and we will share the fruits with you." The emigrants said, "We hear and obey."