YV 6.5h

For a month should he be consecrated; the year is the month; the Viraj is the year; he obtains the Viraj. For four months should he be consecrated; for four months the Vasus bore him, they conquered the earth, the Gayatri metre; for eight the Rudras, they conquered the atmosphere, the Tristubh metre; for twelve the Adityas, they conquered the sky, the Jagati metre; then they attained distinction, supremacy over the gods. Therefore after keeping the fire for twelve months, should one pile it up; the year has twelve months, the fire to be piled is the year, the bricks are days and nights; he piles him with the bricks obtained; verily also he attains distinction, supremacy over his equals. a Agni is piled for the world of heaven; if he were not to mount after him the sacrificer would be excluded from the world of heaven. 'I have mounted on the earth; let not breath forsake me'; 'I have mounted on the atmosphere; let not offspring forsake me'; 'I have mounted on the sky, we have attained the light', he says; this is the mounting after Agni verily by it he mounts after him, to attain the world of heaven. b If he were to set up (the eleven posts) commensurate with the wings [1], he would make the sacrificial rite too small, his offspring would be worse off than himself. He sets (it) up commensurate with the altar; verily he makes the sacrificial rite larger, his offspring does not become worse than himself. e He should pile (the fire) of a thousand (bricks) when first piling (it); this world is commensurate with a thousand; verily he conquers this world. He should pile (it) of two thousand when piling a second time; the atmosphere is commensurate with two thousand; verily be conquers the atmosphere. He should pile (it) of three thousand when piling for the third time [2]; yonder world is commensurate with three thousand; verily he conquers yonder world.