And the Book of the Magians and their religious Law were for a long time during their sovereignty in the possession of the mobeds and 23 herbeds.  Each of the herbeds had a volume which was individual and separate.  In it was associated none of the other herbeds and no outsider had any concern with it.  Subsequently there was a break on account of Alexander setting fire to their books at the time when he invaded Dara, son of Dara, and they admit with unanimity that a portion of their scriptures to the extent of a third has perished.  This has been mentioned by Bashir and Nasik and others of their men of learning....

[Sidenote:  History of Zoroastrian Sacred literature.]

And Magians compiled all the scriptures (ayat) regarding the miracles of Zoroaster such as that of the brass which was spread over and melted on his chest and which did not injure him, and the feet of the horse which had penetrated his belly and which were drawn out by him, etc.

[Sidenote:  Zoroastrians are Kitabis.]

And among those who assert that the Magians are Ahal Kitab are Ali Ibn Talib and Khuzayfa, may God be pleased on these two, and Said Bin Al Musib and Karadah and Abu Thaur and the whole of the sect of the Zahurites.  And we have set out the arguments of the validity of this statement in our book entitled the Isal in the chapters on Jehad, Ceremonial Slaughter, and Nikah.  And therein is sufficiently proved the validity of the acceptance of Jaziya by the prophet of God from them.  For in the clear statement of the Qoran in the last verses of the chapter of Burat, God has declared unlawful the acceptance of the Jaziya from non-Kitabis....

Now as regards the Magians they admit that the books of theirs in which is incorporated their religion were destroyed by fire by Alexander when he slew Dara son of Dara,—­that more than two-thirds of them have perished the remnants being less than a third,—­that their religious law was comprised in what has disappeared.  Now since this is the condition of their religion, then their claims are void altogether became of the disappearance of the majority of their books; since God does not held responsible any person with reference to anything that has not been entrusted to him.

[Sidenote:  Zoroastrians extant scriptures are corrupt.]

And among their books there is one entitled the Khudhay to which they pay great reverence, in which it is related that king Anushirwan prohibited the teaching of their religion in any one of the cities except Ardeshir Khurrah and the religion spread from Datjird.  Before this time it was not taught anywhere except Istakhar and it was not proper for anyone to engage in its study except a special class of people.  And of the books which remained after the conflagration by Alexander there were 23 volumes and there were appointed 23 herbeds, one herbed for