(18) རྒྱ་བྱ་ཡ་ཀྱེ༎ ཇྀ་སྐད་བྱ༎ ད་མེ་འགེ༎ ཇི་ལྟར་བྱ་ཛིམ་ཤིང་ཛོ༎ ལེགསྤ། ཇི་བྱསླ་ཧོའུ།
And, again, as to why he sets it out on the fire-altar,--the Pravargya is the head of the sacrifice, and this built-up fire-altar is the body: hence were he to set it out in any other place than the fire-altar, he would place that head away from that (body), but in that he sets it out on the fire-altar, he, having put together that body of him (Agni), restores the head to it.
Grace, Translation, Identity