|Biographical detail : ||Born at Nif or Naif in Gilan, south of the Caspian in Iran, he was sent to Baghdad at the age of 18 to study. He attended the philological classes of Tibrizi and learned Hanablite law as well as Shafiite laws from different teachers. In 1127 he began preaching in public on the advice of Sufi Yusuf al-Hamdani. His sermons caused the conversion of many Jews and Christians to Islam.
He was the author of Al Ghunya Litalibi Tariq-Al-Haq, Al Fatah Al Rabbani, Fatah Ul Ghaib and many others that were his collection of sermons. Bahjat al Asrar contained the narrative of many miracles performed by the Shaikh. He never claimed of any miracle. He is called Sultan of the saints and his name is never uttered without the epithet Ghaws al Azam. The Qadiri order is named after him and his followers can be traced in any part of the world.
He was buried in Baghdad and the headquarters of the order is also in the city.