Dear James, 

I am almost sure that this term is not used in the early Veda (up to Brahmanas and early Upanisads). However the concept of "burning substance" which, to some extent, coulc be seen as on of the roots of the later yogic experience can be found. It is the influence of Soma which - as it seems from the Rgvedic material - gave the strong experience of heat to its drinker. And Soma itself was conceived as "burning substance", or rather "burning fluid". If you need more references, you are most welcomed to write to me directly. 

Regards, 

Joanna

---
Prof. dr hab. Joanna Jurewicz
Katedra Azji Południowej /Chair of South Asia
Wydział Orientalistyczny / Faculty of Oriental Studies
Uniwersytet Warszawski /University of Warsaw
ul. Krakowskie Przedmieście 26/28
00-927 Warszawa


niedz., 16 wrz 2018 o 18:56 James Hartzell via INDOLOGY <indology@list.indology.info> napisał(a):
Hi there

Could anyone point me to use of the term dahyamāna vastu in the Vedic literature?  It shows up in tantric material discussing the use of mantras in the internal fire of the yogi (with some Vedic ritual comparisons) and it's not perfectly clear to me whether the term is intended to refer to the mantras or the fire itself.

Cheers
James

--
James Hartzell, PhD
Basque Center on Cognition, Brain and Language (BCBL), Donostia, Spain
Center for Mind/Brain Sciences (CIMeC), The University of Trento, Italy
Center for Buddhist Studies, Columbia University, USA

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