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. Shah Waliullah Dehlawi: Shah Waliullah was born on 21 February 1703 to Shah Abdur Rahim, during the reign of Emperor Aurengzeb.
i don't know