4. Ali ibn Ibrahim has narrated from his father from Hammad ibn ‘Isa from Hariz from Zurarah and Muhammad ibn Muslim who has said the following:

“They asked abu Ja‘far and abu ‘Abd Allah, ‘Alayhim al-Salam, about slaves. They (the two Imam), ‘Alayhim al-Salam, said, ‘Zakat which is more than one Sa’ of date is not due per-head, when one year passes. There is nothing on what is paid as his price unless he has remained in one’s possession for one year.’”