Sacred formulas known as mantras were recited by the priest responsible for the sacrificial fire
and the carrying out of the ceremony; these mantras and verses in time were drawn into Samhitas known collectively as Yajurveda.
The sacrificial fire is homologized not only with the five breaths, but also with the inner digestive fire.
In the Tibetan food yoga as well, it is not only the sacrificial fire that is interiorized but also the devas who are the recipients of the oblations.
The vedic oblations are, after all, destroyed in the sacrificial fire (Heesterman 1993: 7-44).
The Hindu Prandgnihotra Upanisad 27-32, which speaks about the location of four-plus-one sacrificial fires within the human body, locates these fires in the head, mouth, heart, and navel, while the fifth one is related to procreation.