[1] Maga and yāh
These two words are mentioned in connection exclusively with the enumeration of proper names:
- maga appears in Y 46.14, Y 51.11, Y 51.16 :
- yāh also appears in Y 46.14, then in Y 49.9.
We still have to analyze the Gāθā Ahunauuaitī, where the two terms are not included in the enumeration of proper nouns, but in which they appear later at Y 29.11 and Y 30.2.
What happens in the text between the enumeration of proper names and the mention of maga and yāh ? This is the "lament of the Cow's soul" (Y 29). The attestations of maga and yāh make it possible to integrate the complaint of the Cow's soul into the process represented by the enumeration of proper names.
maga
This term is found only in Old-Avestic. As for etymology, it is of little help to us, since the parallel with the Indian maṃh-"to grant", hence the translation by "benefit", has proved false. Mayrhofer's etymology with skt. maghá-"strength, power" does not seem operative in the contexts available to us.
yāh
The word still exists in Late Avestic in the compound yās-kǝrǝt-" yāh-makers" (Yt 13.75) referring to the Frauuaṣ̌is, i.e. a quality attributed to deities. As for etymology, it's made difficult by the ambiguity of two roots yā "to ask" and "to go by vehicle". If we keep the first solution, we must ask ourselves what is this great request? A clue can be found in the Yasna Haptaŋhāiti, which mentions the term at Y 36.2: "You whom here is most exalting, may you meet the object of our request, O fire of Master Mazdā! By the exaltation given by the most exalting, by the homage paid by the most honoring, may you meet the greatest of our requests !".
The Yasna Haptaŋhāiti consists of three parts: 1. Y 35-36: introduction where Y 35 is a discourse on the act(š́iiaoθana) and Y 36 describes the sacralization of mundane fire into ritual fire; 2. Y 37-39: central yasna; 3. Y 40-41: set of praises and requests, i.e. a vahma. The transubstantiation of fire is thus an essential prerequisite for the sacrifice, which cannot begin without it and which appears in Y 36.