the comparison of “rada” in yaresan literature with “rata “in zoroastrianism

in sacred text of the religion of yari, we are confronted with some emphasized moral principles which have been stated by the great men of this religion repeatedly. these moral principles are honesty, purity, inexistence and rada. this article attempts to study the root of the term of rada in yaresan literature. it specifies that the term rada in yaresan literature which means donation, generosity and bounty is the same with rata in avesta and zoroastrianism; because rata in zoroastrianism is the god of generosity and bounty, and it is also considered as a moral criterion in this religion. the only difference between these two terms is in the phonemes “d“ and “t“ that is considered as a general rule among the rules of the phonemes transformation.