الكافي- ط الاسلامية, volume 5, page 211

10. Humayd ibn Ziyad has narrated from al-Hassan ibn Muhammad ibn Sama‘ah from more than one person from Aban from ‘Abd al- Rahman ibn abu ‘Abd Allah who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the slaves of the taxpayers; if I can buy from them. He (the Imam) said, ‘You can buy them if they certify their slavery.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

11. Aban has narrated from Zurarah who has said the following: “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.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

12. Ali ibn Ibrahim has narrated from his father from ibn abu Najran from ‘Asem ibn Hamid from Muhammad ibn Qays who has said the following: “Abu Ja‘far (a.s.), has said that ’Amir al-Mu’minin (a.s.), issued a judgment in the case of a slave-girl who is the mother of a child who is sold by the son of her master in the absence of his father. The buyer made her to become pregnant and a boy was born. Then her first master came and disputed the second master, saying: she was the mother of my child whom my son had sold without my permission. He (the Imam) said, ’The judgment gave him the mother and the child.’ The one who had bought begged and pleaded before him (the Imam). He said, ‘Take his son who sold to you the mother of the child until he pays you for the sale.’ When he took him his father said, ‘Allow my son to go.’ He said, ‘No, by Allah, I will not allow him to go until you allow my son to go.’ When the master of the mother of the child saw this he authorized the sale of his son.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

13. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Jamil ibn Darraj from Hamzah ibn Humran who has said the following: “I once said to abu ‘Abd Allah (a.s.), ‘I go to the market to buy a slave-girl and she says that she is free. He (the Imam) said, ‘You can buy her unless she presents proof of her freedom.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.