With Mitra and Varuna (Grassmann, Warterbuch, s.v.); in Zend, according to Bartholomae (Altiranisches Warterbuch, s.v.), from the earliest literature, the Gathas, there is nothing definite to be learnt regarding Airyaman.
The kernel of the whole book, around which the remaining portions are grouped, consists of the Gathas or " hymns " of Zoroaster (q.v.), the oldest and most sacred portion of the entire canon.
(b) The Gathas (chaps.
The Gathas proper, arranged according to the metres in which they are written, fall into five subdivisions (28 -34, 43-4 6, 47-5 0, 51, 53).
Between chap. 37 and chap. 43 is inserted the so-called Seven-Chapter Yasna (haptanghaiti), a number of small prose pieces not far behind the Gathas in antiquity.