According to Hojat-ol-Islam Mohammad Hassan Nurinia, an official with the Astan (custodianship) of Imam Reza (AS) holy shrine, the Quran exegesis is believed to be among the earliest written in Persian.
He said the manuscript has 28 by 17 centimeter pages each containing 18 lines, IRIB news reported.
The name of the author is not known, Nurinia said, adding that it is believed that he was a Shia Muslim.
The author mentions each verse, its Persian translation and then interpretation of the verse, he went on to say.
The library of Astan Quds Razavi in Mashhad holds more than 97,000 manuscripts, including 22,000 rare handwritten copies of the Quran.