He is perhaps best known for issuing a fatwa (a legal ruling) whereby anyone that gives Ibn Taymiyya the title "Shaykh al-Islam" is a disbeliever,[2] and authored a book against him entitled "Muljimat al-Mujassima" (Arabic: ملجمة المجسمة, lit.
After involving himself in debates in Cairo between supporters and opponents of Ibn 'Arabi,[3] he moved to Damascus where he composed the "Fadihat al-Mulhidin wa Nasihat al-Muwahhidin" (Arabic: فاضحة الملحدين وناصحة الموحدين, lit.
However, a man of principle, he soon fell out with his Indian patron and left the Subcontinent for Mecca, where he lived for several years until the Mamluk sultan Bars Bay (r. 825/1422-841/1438) invited him to the Egyptian capital.
In Syria, where he settled after his departure, al-Bukhari kept thinking about his "humiliation" at the hands of al-Bisati and composed a lengthy refutation of Ibn 'Arabi and his school, titled "Fadihat al-Mulhidin wa Nasihat al-Muwahhidin" (Arabic: فاضحة الملحدين وناصحة الموحدين, lit.
Unmindful of the wide opposition to his critique among his Syrian colleagues, al-Bukhari boldly demanded that Ibn Taymiyya be divested of his honorific title of shaykh al-Islam, proclaiming everyone who refused to do so an unbeliever.