Amir al-Sha'bi عامر الشعبي · Commercial Transactions (Kitab Al-Buyu)

A man seized his debtor who owed ten dinars to him. He said to him: I swear by Allah, I shall not leave you until you pay off (my debt) to me or bring a surety. The Prophet (ﷺ) stood as a surety for him. He then brought as much (money) as he promised. The Prophet (ﷺ) asked: From where did you acquire this gold? He replied: From a mine. He said: We have no need of it; there is…

I heard the Messenger of Allah (ﷺ) say: What is lawful is clear and what is unlawful is clear, but between them are certain doubtful things. I give you an example for this. Allah has a preserve, and Allah's preserve is the things He has declared unlawful. He who pastures (his animals) round the preserve will soon fall into it. He who falls into doubtful things will soon be courageous.

The Prophet (ﷺ) said: (The standard) weight is the weight of the people of Mecca, and the (standard) measure is the measure of the people of Medina. Abu Dawud said: Al-Firyabi and Abu Ahmad have also transmitted from Sufyan in a similar way, and he (Ibn Dukain) agreed with them on the text. The version of Abu Ahmad has: "from Ibn 'Abbas" instead of Ibn 'Umar. It has also been transmitted by al-Walid b. Muslim from Hanzalah. This version has:…