Ibn Hajar al-Asqalani

Ahmad ibn Ali ibn Hajar al-Asqalani (773-852 AH / 1372-1449 CE) was the greatest hadith scholar of the later Islamic period and the author of Fath al-Bari, the most authoritative and comprehensive commentary on Sahih al-Bukhari. Born in Cairo to a family originally from Ascalon in Palestine, he was orphaned as a child and raised by a merchant who ensured his education. He memorized the Quran by age nine and began studying hadith intensively from a young age, traveling throughout Egypt, the Levant, the Hejaz, and Yemen to learn from the foremost scholars of his era, including Zayn ad-Din al-Iraqi.

Ibn Hajar's Fath al-Bari bi-Sharh Sahih al-Bukhari is universally regarded as the greatest single work of hadith commentary in Islamic history. It took him over twenty-five years to complete and covers every hadith in al-Bukhari's Sahih with exhaustive analysis of the chain of narration, variant readings, linguistic explanation, legal implications, reconciliation with apparently contradictory narrations, and the positions of the different schools. He also authored al-Isabah fi Tamyiz as-Sahabah (the most comprehensive biographical dictionary of the Companions), Tahdhib at-Tahdhib (an abridgment and update of al-Mizzi's narrator biographies), Bulugh al-Maram (hadith on legal rulings, widely used in Shafii education), Nukhbat al-Fikr (a concise manual on hadith terminology), and dozens of other works.

Ibn Hajar served as the Shafii chief judge of Egypt and was the undisputed scholarly authority of the Mamluk realm. He died in Cairo in 852 AH (1449 CE). It is said that no hadith work is studied more widely than Fath al-Bari, and his other works on narrator biography and hadith methodology remain indispensable references for every serious student of hadith.