Khwaja Nasrullah Hindi:
"The famous account of the birth of Amir al-Mu’minin (peace be upon him) among us is that the practice of the pre-Islamic people was to open the door of the Ka'bah on the 15th of Rajab and enter it for visitation. Among those who entered was Fatimah bint Asad, and her delivery coincided with that day."
Source: "Al-Suyuf al-Mushriqa wa Mukhtasar al-Sawa'iq al-Muhriqa," p. 204.
Alkarbala