Momin bin Hassan Shablanji Shafi'i also writes in "Nur al-Absar":
"He (peace be upon him) was born in Mecca, inside the Sacred House, according to some reports, on Friday, the 13th of Rajab in the 30th year of the Year of the Elephant, twenty-three years before the Hijra."
Source: "Nur al-Absar," p. 158.