YV 6.5f

In that there is an oblation to Brhaspati, and Brhaspati is the holy power of the gods, verily he supports by it holy power. In that there is (an offering) to Visnu on three potsherds, and Visnu is the sacrifice, verily he supports by it the sacrifice. In that he sacrifices with the Abhijit in the third year, (it serves) for conquest. In that he keeps the fire in the pan for a year, he [2] saves this world by it; in that he piles the fire in the second year, he saves the atmosphere by it; in that he sacrifices in the third year, he saves yonder world by it. This (fire) Para Atnara, Kaksivant Auçija, Vitahavya Çrayasa, and Trasadasyu Paurukutsya piled, being desirous of offspring; then indeed did they win thousands each of children; he is extended with offspring, with cattle, that measure he attains which they attained, who knowing thus piles the fire. a Prajapati piled the fire; it kept being razor-edged; the gods in terror did not approach it; they, clothing themselves in the metres, approached it, and that is why the metres have their name. The metres are holy power; the black antelope skin is the form of holy power; he puts on a pair of black antelope skin shoes; verily clothing himself with the metres he approaches the fire, to prevent injury to himself. b The fire is put down as a treasure of the gods [1]. Now a treasure unguarded others find, or he cannot recollect where it is; he steps on the fire-pan; verily he makes himself its overlord, for guardianship. Or rather they say, 'It should not be stepped on'; the pan is connected with Nirrti; if he were to step on it, he would hand himself over to Nirrti; therefore it should not be stepped on. He puts down the human head, for guardianship; and moreover this is just as if one should say, 'Guard that for me' [2]. c Atharvan is Prajapati; Dadhyañc Atharvana is the fire, his bones are the bricks; as to that the seer says, 'Indra with the bones of Dadhyañc'.