A Hanbali theologian, great preacher and, perhaps the most influential Sufi figure who founded the Qadiriyah way (Tariqa). Although, his life is regarded as a chain of miracles, so much has been claimed about his ‘sainthood’ by his passionate Sufi followers that very little of his biographical accounts can be verified. The only book one can attribute to al-Jailani with a level of surety is al-Ghunya, in which he spells out his strict adherence to the Hanbali dogma and Law.