Salam alaikum, in his book “Kasfhul ghumma” Arbili quoted al-Hafith Abdulaziz, which said:

Abu Abdullah Jafar ibn Muhammad ibn Ali ibn al-Hussain ibn Ali ibn Abu Talib (a), as-Sadiq, his mother was Ummu Farwa bintul Qaseem ibn Muhammad ibn Abu Bakr as-Siddiq (radiAllahu anhu), and her mother was Asma bintu Abdurrahman ibn Abu Bakr as-Siddiq, and due to that Jafar said: “Abu Bakr as-Siddiq born me twice“.