- Abubakar
- Umar
- Usman
- Ali
Hazrat Ali ibn Abi Talib (RA) is famously titled “Bab-ul-Ilm” or “Gateway to Knowledge” based on Prophet Muhammad’s (ﷺ) statement: “I am the city of knowledge, and Ali is its gate.” This hadith, narrated by multiple companions, establishes Ali’s exceptional scholarship, wisdom, and authority in Islamic sciences. His judicial decisions, Quranic exegesis, and Arabic grammatical contributions profoundly influenced subsequent Islamic intellectual traditions.
