Ezra, Book

In the Persian period, the Torah, which is made up of various law collections, was ascribed to Moses as revealed by YHWH. A parallel development was taking place in Achaemenid Persia that sheds light on this process: The sacred texts called the Avesta, that contain the law​​ (dāta) and tradition (daēnā) of Zoroastrianism​, were being collectively ascribed to Zarathustra (Zoroaster) as revealed by Ahuramazdā.