Which of the following is known for his piety and memorized the Qur'an by the age of 7: Ahmad Nahavandi or Shah Waliullah Dehlawi?
Ahmad Nahavandi Ahmad ibn Muhammad al-Nahawandi was a Persian astronomer of the 8th and 9th centuries. His name indicates that he was from Nahavand, a city in Iran.
Ziauddin Barani Ziauddin Barani (1285–1357) was a Muslim political thinker of the Delhi Sultanate located in present-day North India during Muhammad bin Tughlaq and Firuz Shah's reign. He was best known for composing the "Tarikh-i-Firuz Shahi", a work on medieval India, which covers the period from the reign of Ghiyas ud din Balban to the first six years of reign of Firuz Shah Tughluq and the "Fatwa-i-Jahandari" which details the caste system among Muslims in the Indian Subcontinent.