Sahih Muslim | Book 10 | Hadith Number 3745

Narrated by Rafi (Allah be pleased with him)
Rafi (Allah be pleased with him) reported that Zuhair b. Rafi (who was his uncle) came to me and said: Allah's Messenger (may peace be upon him) forbade a practice which was useful for us. I said: What is this? (I believe) that whatever Allah's Messenger (may peace be upon him) says is absolutely true. He (Zuhair) said that he (the Holy Prophet) asked me: What do you do with your cultivable lands? I said: Allah's Messenger, we rent those irrigated by canals for dry dates or barley. He said: Don't do that. Cultivate them or let them be cultivated (by others) or retain them yourself.