Jafar as-Sadiq on Abu Bakr
al-Ardabili in his “al-Kashf al-ghumma fi marifatul aimma” (2/374) wrote:
al-Hafidh Abdulaziz ibn al-Ahdar al-Janabezi - rahimahullah – said: Abu Abdullah Jafar ibn Muhammad ibn Ali ibn Husayn ibn Ali ibn Abu Talib – alaihuma salam, as-Sadiq. His mother Ummu Farwa her name Qareebah bintul Qasim ibn Muhammad ibn Abu Bakr as-Sadiq – radi Allahu anhu. And her mother Asma bintul Abdurrahman ibn Abu Bakr as-Sadiq and due to this, Jafar use to say: Abu Bakr bore me twice.