Ibn Hajar
Fatḥ al-Bārī fī Sharḥ Ṣaḥīḥ al-Bukhārī () is a multi-volume commentary on the Sunni hadith collection "Sahih al-Bukhari", composed by Ibn Hajar al-'Asqalani. Considered his magnum opus, it is the most celebrated hadith commentary. It is reported that it took Ibn Hajar 25 years to finish his work.