ASS: abdīh ud sahīgīh ī zamīg ī Sagestān | The wonders and mirabilia of the land of Sakastāna
In a short treatise, in Pārsīg, from Drangiana (Sakastāna), it is said that, after Alexander’s onslaught, a few men of priestly class escaped and fled to Drangiana. There was a man, called Sēn-burzmihr, who had compiled two Liturgies from Avesta books, the Dva.yasna: One, the Yasna and Visprad (the Long Liturgy) and the Yašt and Niyāyišn (the Short Liturgy, the Xvardag Abestāg)