YV 6.5g

In that he piles the fire with the bricks, he piles up the fire with itself; he has his own self in yonder world who knows thus. d (The fire) to be piled is the body of Agni, Vaiçvanara is the self; in that he offers to Vaiçvanara after the piling, he prepares its [3] body and mounts it; the sacrificer thus prepares his body, in that he piles the fire; in that he offers to Vaiçvanara after the piling, verily having pre pared his body he mounts it with the self; therefore they do not cut off from it; verily living he goes to the gods. e He puts on dust with a verse addressed to Vaiçvanara; Agni Vaiçvanara is this (earth), the dust is its piling; verily he piles Agni Vaiçvanara; Vaiçvanara is the form dear to Agni; verily he wins the form dear to him. The gods obtained the brilliance (virájam) of Agni by means of the consecration; for three nights should he be consecrated; the Viraj has three feet, he obtains the Viraj. For six nights should he b consecrated; the year consists of six seasons; the Viraj is the year, he obtains the Viraj. For ten nights should he be consecrated; the Viraj has ten syllables; he obtains the Viraj. For twelve nights should he be consecrated; the year has twelve months; the Viraj is the year; he obtains the Viraj. He should be consecrated for thirteen nights; the year has thirteen months [1]; the Viraj is the year; he obtains the Viraj. For fifteen nights should he be consecrated; the nights of the half-month are fifteen; the year is made up by the half-months; the Viraj is the year; he obtains the Viraj. For seventeen nights should he be consecrated; the year has twelve months and seven seasons; the Viraj is the year; he obtains the Viraj. For twenty-four nights should he be consecrated; the year has twenty-four half-months; the Viraj is the year; he obtains the Viraj. For thirty nights should he be consecrated [2]; the Viraj has thirty syllables; he obtains the Viraj.