Qasim 's mother was of ' Ali 's family and his daughter Farwah bint al - Qasim was the mother of Jafar al - Sadiq .
Farwah bint al - Qasim married Muhammad al - Baqir .
Qasim 's mother was of ' Ali 's family and his daughter Farwah bint al - Qasim , who married Muhammad al - Baqir , was the mother of Jafar al - Sadiq .