The First Imam, ‘Ali (as) Ibn Abu Talib (as)’
It was Friday 13th of Rajab 30 Amulfeel Hazrat Fatima binte Asad, the wife of Hazrat Abu Talib entered the precincts of the Kaaba and prayed to Allah saying O’my protector ease my pain. All of a sudden the wall of the Kaaba cracked and opened up and she, as if by some unseen force went inside the Kaaba and the wall closed. ‘Ali (as) the youngest son of Abu Talib was born inside the Holy Kaaba. She stayed inside for three days. On the 3rd day she came out through the door and Muhammad (PBUH) was waiting outside. She told Muhammad (S) that the boy had not taken any milk. Muhammad gave him the first feed from his mouth and afterwards asked his uncle Abu Talib that he wished to adopt the baby. Khawja Moinuddin Chishti Ajmeri mentions this fact in his famous Quartet saying that when ‘Ali was born inside the kaaba the Sky and the earth was filled with a light and Angel Gabriel announced that a child was born in the house of God.
The Prophet Muhammad (saww) said: I am the house of wisdom and ‘Ali is its door (Sahih al-Tirmidhi, (Cairo edition), Kitab al-Manaqib, vol. 5, p. 637, hadith number 3723)