Urwa ibn al-Zubayr عروة بن الزبير · Commercial Transactions (Kitab Al-Buyu)

The Prophet (ﷺ) forbade the sale of grapes till they became black and the sale of grain till it had become hard.

I heard Ibn Umar say: We did not see any harm in sharecropping till I heard Rafi' ibn Khadij say: The Messenger of Allah (ﷺ) has forbidden it. So I mentioned it to Tawus. He said: Ibn Abbas told me that the Messenger of Allah (ﷺ) had not forbidden it, but said: It is better for one of you to lend to his brother than to take a prescribed sum from him.

When the Prophet (ﷺ) conquered Khaibar. He then narrated it like the tradition of Zaid (b. Abu al-Zarqa'). This version has: He then assessed the produce of the palm-trees and said: I take the job of picking the fruit myself, and I shall give you half of (the amount) I said.