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Sufism - Wikipedia
Sufism | Definition, History, Beliefs, Significance, & Facts
Who Are Sufi Muslims and Why Do Some Extremists Hate Them?
What is Sufism? – The Threshold Society
History of Sufism - Wikipedia
BBC - Religions - Islam: Sufism
Sufism - Mysticism, Islamic Traditions, Sufi Orders | Britannica
Sufism – International Association of Sufism
Sufism - Mysticism, Poetry, Rituals | Britannica
International Association of Sufism – Islamic Center