Hadith Scan

Ṣafūrī al-Shāfi‘ī, one of the Sunni scholars, also mentions the birth of Imam Ali (peace be upon him) in the Ka‘bah in two of his works, quoting from the book Al-Fuṣūl al-Muhimmah. He narrates as follows:
"I found in the book Al-Fuṣūl al-Muhimmah fī Ma‘rifat al-A’immah, authored by Abū al-Ḥasan al-Mālikī, that Ali’s mother gave birth to him inside the Ka‘bah, and this is a virtue granted exclusively to him by Allah. The story is as follows: Fāṭimah bint Asad (may Allah be pleased with her) experienced severe labor pains, so Abū Ṭālib brought her into the Ka‘bah. With a single contraction, she gave birth to him. This event occurred on Friday, the 13th of Rajab, in the 30th year of the Year of the Elephant."
Reference: Nuzhat al-Majālis, Page 159