It is narrated from Imam Ja'far bin Muhammad (Ja'far al-Sadiq) (may Allah have mercy on him) that he mentioned Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him), praised him highly and said: "He gave birth to me twice (that is, I am doubly related to him by lineage)."
What is meant by this saying is that the mother of Imam Ja'far al-Sadiq (may Allah have mercy on him), Umm Farwah, was the daughter of al-Qasim bin Muhammad bin Abi Bakr, and her mother was Asma bint Abd al-Rahman bin Abi Bakr; in this way the Imam's lineage reaches Sayyiduna al-Siddiq al-Akbar (may Allah be pleased with him) from two sides.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب المناقب / 3881
Hadith Gradingمحدثین:إسناده صحيح، مقطوع
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده صحيح مقطوع » «انفرد به المصنف من هذا الطريق»