al-Laith bin Sa'd الليث بن سعد · Commercial Transactions (Kitab Al-Buyu)

The Prophet (ﷺ) was brought a necklace in which there were gold and pearls. (The narrators AbuBakr and (Ahmad) Ibn Mani' said: The pearls were set with gold in it, and a man bought it for nine or seven dinars.) The Prophet (ﷺ) said: (It must not be sold) till the contents are considered separately. The narrator said: He returned it till the contents were considered separately. The narrator Ibn Asa said: By this I intended trade. Abu Dawud said:…

At the battle of Khaibar I bought a necklace in which there were gold and pearls for twelve dinars. I separated them and found that its worth was more than twelve dinars. So I mentioned that to the Prophet (ﷺ) who said: It must not be sold till the contents are considered separately.

We used to lease land for what grew by the streamlets and for what was watered from them. The Messenger of Allah (ﷺ) forbade us to do that, and commanded us to lease if for gold or silver.

The Messenger of Allah (ﷺ) made an agreement with the people of Khaibar to work and cultivate in return for half of the fruits or produce.