Sufism or taṣawwuf (Arabic: تصوّف‎) is defined by its adherents as the inner, mystical dimension of Islam. A practitioner of this tradition is generally known as a ṣūfī (صُوفِيّ).

Classical Sufi scholars have defined Sufism as "a science whose objective is the reparation of the heart and turning it away from all else but God". Alternatively, in the words of the Darqawi Sufi teacher Ahmad ibn Ajiba, "a science through which one can know how to travel into the presence of the Divine, purify one's inner self from filth, and beautify it with a variety of praiseworthy traits".

Classical Sufis were characterised by their attachment to dhikr (a practice of repeating the names of God) and asceticism. Sufism gained adherents among a number of Muslims as a reaction against the worldliness of the early Umayyad Caliphate (661-750 CE). Sufis have spanned several continents and cultures over a millennium, at first expressed through Arabic, then through Persian, Turkish and a dozen other languages. "Orders" (ṭuruq), which are either Sunnī or Shī'ī or mixed in doctrine, trace many of their original precepts from the Islamic Prophet Muhammad through his cousin 'Alī, with the notable exception of the Naqshbandi who trace their origins through the first Caliph, Abu Bakr. Other exclusive schools of Sufism describe themselves as distinctly Sufi. Modern Sufis often perform dhikr after the conclusion of prayers.

Taqi ad-Din Ahmad ibn Taymiyyah (January 22, 1263–1328 CE), full name: Taqī ad-Dīn Abu 'l-ʿAbbās Aḥmad ibn ʿAbd al-Ḥalīm ibn ʿAbd as-Salām Ibn Taymiya al-Ḥarrānī (Arabic: تقي الدين أبو العباس أحمد بن عبد السلام بن عبد الله ابن تيمية الحراني‎), was an Islamic scholar (alim), theologian and logician born in Harran, located in what is now Turkey, close to the Syrian border. He lived during the troubled times of the Mongol invasions. He was considered by his followers to be a member of the school founded by Ahmad ibn Hanbal and sought the return of Islam to what he viewed as earlier interpretations of the Qur'an and the Sunnah.

Ibn Taymiyya was born in 1263 at Harran into a well-known family of theologians and died in Damascus, Syria, outside of the Muslim cemetery. His grandfather, Abu al-Barkat Majd ad-deen ibn Taymiyyah al-Hanbali (d. 1255) was a reputable teacher of the Hanbali school of law. Likewise, the scholarly achievements of ibn Taymiyyah's father, Shihab al-deen 'Abd al-Haleem ibn Taymiyyah (d. 1284) were well known. Because of the Mongol invasion, ibn Taymiyyah's family moved to Damascus in 1268, which was then ruled by the Mamluks of Egypt. It was here that his father delivered sermons from the pulpit of the Umayyad Mosque, and ibn Taymiyyah followed in his footsteps by studying with the scholars of his time. Although some claim that he was of Kurdish origin there seems to be no evidence indicating such claim.^{[citation needed]}

Habib Ali Zain al-`Abideen al-Jifri (Arabic: الحبيب علي زين العابدين الجفري‎; born April 16, 1971) is an Islamic scholar from Hadhramaut, Yemen of the Shafi'i school of Fiqh, and the Ashari school of Aqida.

Shaykh Habib Ali al-Jifri was born in Jeddah, Saudi Arabia. He is a sayyid (a descendent of the Islamic prophet Muhammad) and traces his lineage to the family of 'Ali, the fourth Caliph of Islam and cousin of the Prophet Muhammad.

He follows the Ba'Alawi sufi order, a tradition that has been based in Yemen for approximately 800 years and traces back to the Prophet Muhammad.

Al-Jifri grew up in an educated environment, and became interested in Islamic sciences, studying under a number of scholars in the Hejaz and Hadhramaut, Egypt, Syria and other countries, and receiving their sole discretion. He is the holder of degrees in Islamic sciences.

Al-Jifri is the founder and director-general of the nonprofit privately-funded Tabah Foundation for Islamic Studies in Abu Dhabi, UAE. He is a member of the board of Dar al-Mustafa Islamic University in Tarim, Yemen. He runs the Islamic Center in Jeddah, Saudi Arabia.