Abu Ishaq al-Sabay'ai' أبو إسحاق السبيعي عمرو بن عبد الله · Commercial Transactions (Kitab Al-Buyu)

I heard the Messenger of Allah (ﷺ) say: If any of you can become like the man who had a faraq of rice, he should become like him. They (the people) asked: Who is the man who had a faraq of rice with him, Messenger of Allah ? Thereupon he narrated the story of the cave when a hillock fell on them (three persons), each of them said: Mention any best work of yours. The narrator said: The third of…

Rafi' had cultivated a land. The Prophet (ﷺ) passed him when he was watering it. So he asked him: To whom does the crop belong, and to whom does the land belong? He replied: The crop is mine for my seed and labour. The half (of the crop) is mine and the half for so-and-so. He said: You conducted usurious transaction. Return the land to its owner and take your wages and cost.