heresiographer การใช้
- The 12th-century heresiographer al-Shahrastani describes the Majusiya into three sects, the " Kayumarthiya ", the " same treatment to the Zoroastrian people which they did to other " People of the Book ".
- He is not mentioned in any Jewish source, and apart from the Andalusian heresiographer and polemicist Ibn Hazm, who mentions him as a Jewish mutakallim ( rational theologian ), our main source of information is the " Kitb al-Tanb + h " by the Muslim historian al-Mas?kd + ( d . 956 ).