YV 5.5f

The fire is piled for the world of heaven; whatever is done out of order, that is not heavenly; the fire is heavenly; having put down the layer he should stroke it, (saying), 'May the wise discern wisdom and folly, like backs straight and crooked, like men; for wealth and good offspring, O god, grant us freedom, and keep bondage from us.' Verily he puts it down in order. He piles (the fire) facing east; it becomes heavenly for him. Viçvakarman, lord of the quarters, may he protect our cattle, may he protect us, to him homage! Prajapati; Rudra; Varuna; Agni; lord of the quarters; may he protect our cattle, may he protect us, to him homage!' These are the deities, overlords of these animals; to them he is cut off who puts down the heads of the animals. He puts down the gold bricks; verily he pays honour to these deities. The theologians [1] say, 'In the fire he places the domesticated animals, with pain he afflicts the wild animals; what then does he leave?' In that he puts down the golden bricks, and gold is immortality, by immortality he makes healing for the domesticated animals, he hurts them not. The first naturally perforated brick is expiration, the second cross -breathing, the third inspiration. Having put down the first naturally perforated brick he should breathe out along it; verily he unites expiration with expiration; having put down the second [2] he should breathe across; verily he unites cross-breathing with cross-breathing; having put down the third, he should breathe in; verily he unites inspiration with inspiration; verily he kindles him with the breaths. 'Bhuh, Bhuvah, Suvar', (with these words) he puts down the naturally perforated bricks; the naturally perforated bricks are these worlds; with these exclamations Prajapati was propagated; in that he puts down the naturally perforated bricks with these exclamations, he puts down these worlds, and over these [3] worlds he is propagated.