Qutbuddin Bakhtiar Kaki, who was born in Aush in Farghana was the leading disciple of Khwaja Muinuddin Chishti came to Delhi where he was warmly welcomed and extended patronage by lItutmish.
Barani was a contemporary of Muhammad bin Tughlaq and Firuz Shah Tughlaq both. He wrote a number of renowned texts, such as the Fatwa-i-Jahandari, which elaborates on the principles to be followed by Muslim rulers to attain merit.