Zoroaster scholars, philosophers, and theologians to test his knowledge on religion and jurisprudence. Among the summoned scholars was a Zoroastrian High Priest. Al-Ridha questioned the priest on his beliefs saying,“Tell me about Zoroaster, whom you claim is a prophet; what is your evidence for his Prophethood?” to which the response was “We did not see him, but the tales of our ancestors informed us that he had legalized for us what no other person before had made legal.” Imam Al-Ridha responded “This is the case with all other nations. Tales had come to them about what the prophets had accomplished, what
Zoroaster eastern Iran, including Central Asia, remain tentative". Zoroaster is recorded as the son of Pourušaspa of the Spitaman or Spitamids (Avestan "spit" mean "brilliant" or "white"; some argue that Spitama was a remote progenitor) family, and Dugdōw, while his great-grandfather was Haēčataspa. All the names appear appropriate of the nomadic tradition, as his father's means "possessing gray horses" (with the word "aspa" meaning horse), while his mother's is "milkmaid". According to the tradition, he had four brothers, two older and two younger, whose names are given in much later Pahlavi work. His training for the priesthood probably started very early,