Sahih Bukhari
Conditions
Volume: 003 / Book Number: 050 / Hadith Number: 883
Narrated Rafi bin Khadij:
We used to work on the fields more than the other Ansar, and we used to rent the land (for the yield of a specific portion of it). But sometimes that portion or the rest of the land did not give any yield, so we were forbidden (by the Prophet ) to follow such a system, but we were allowed to rent the land for money.