“This is concerning my question before abu ‘ Abd Allah (a.s.), about the case of a man who buys a slave-girl for a certain price, then sells her (on credit) and makes a profit before paying the owner. The owner comes and demands payment but he does not pay. The owner says to those who have bought her to pay him what the person selling the slave-girl owes him and the profit that he has made is for them. He (the Imam) said, ‘It is not unlawful.’”