Sufism or mysticism emerged in the 8th century. Some of the early known Sufis are as follows: Rabia al-Adawiya, Al-Junaid, and Bayazid Bastami. Sufism evolved into a well-developed movement by the end of the 11th century.
Iitutmish , the Sultan of Delhi, was contemporary of Mongol leader Chengiz Khan. In 1221 A.D., there was a danger of expected attack of Chengiz khan on Delhi.