Shihāb al-Dīn Abu'l-‘Abbās Aḥmad ibn Muḥammad ibn Abī Bakr al-Qasṭallānī al-Qutaybī al-Shāfi‘ī (Arabic: أحمد بن محمد ابن أبي بكر ابن عبد الملك بن أحمد بن حسين بن علي القسطلاني المصري الشافعي), also known as Al-Qasṭallānī was a Sunni Islamic scholar who specialized in hadith and theology. He owed his literary fame mainly to his exhaustive commentary on the Sahih al-Bukhari entitled Irshād al-Sarī fī Sharḥ al-Bukhārī.