Abu Bakr al-Kalabadhi (Arabic: أبو بكر الكلاباذي), in full, Abu Bakr ibn Abi Ishaq Muhammad ibn Ibrahim ibn Ya‘qub al-Bukhari al-Kalabadhi (Arabic: أبو بكر بن أبي إصحاق محمد بن إبراهيم بن يعقوب البخاري الكلاباذي) (fl.
late 10th century, Bukhara) was a Persian[1] Hanafi Maturidi[2] Sufi scholar and the author of the Kitab at-ta'arruf, one of the most important works of Sufism composed during the first 300 years of Islam.
Kalabadhi studied Sufism under Abu al-Husayn al-Farisi and Fiqh under Muhammad ibn Fadl.
The work was written primarily for two purposes: to advocate the Sahu ("sober") school of Sufi thought and to assure adherents of orthodox Islam that Sufism does not contradict their beliefs.
The book is still understandable for modern readers and preserves many important quotes from the first three hundred years of Islam.