الكافي- ط الاسلامية, volume 5, page 147

12. Ahmad ibn Muhammad from has narrated from ibn Faddal from abu Jamilah from Sa‘d ibn Tarif who has said the following: “Abu Ja’far (a.s.), has said, ‘The filthiest earning is earning by means of Riba , . ,,,

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

1. Hamid ibn Ziyad has narrated from al-Khashshab from ibn Baqqah from Mu’adh ibn Thabit from ‘Amr ibn Jumay‘ who has said the following: “Abu ‘ Abd Allah (a.s.), has said that Amir al-Mu’minin (a.s.), has said, ‘There is no Riba ’ between a man and his sons as well between a master and his slave.”’

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

2. Through the same chain of narrators as the previous one is the following Hadith: “The Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘There is no Riba ’ between us and those in the state of war with us. We can receive a thousand dirham from them for just one dirham. We have permission to receive from them but we must not give them anything.’”

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

3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Tsa from Yasin al-Darir from Hariz from Zurarah who has said the following: “Abu Ja‘far (a.s.), has said, ‘ Riba ’ does not apply in the case of a man and his sons, his slave and his wife. Riba ’ applies when you do not own certain goods.’ I then asked, ‘Does it apply between me and the pagans?’ He (the Imam) replied, ‘Yes, it applies.’ I said, ‘They are slaves.’ He (the Imam) said, ‘You do not own them. You own them along with others. You and people other than you are equal about them. What is between you and them is not of that nature; your slave is not like the slave who is your slave as well as the slave of someone other than you.’”

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