YV 2.6g

So they won the earth, and in that they won it therefore is the Vedi so called [4]. All this earth is the Vedi, but they measure off and sacrifice on so much as they deem they can use. The back cross- line is thirty feet, the eastern line is thirty-six feet, the front cross-line is twenty- four feet. These make up tens; the Viraj has ten syllables; the Viraj is food; verily by the Viraj he wins food. He digs up (the earth); verily he digs away whatever in it is impure. He digs up; therefore the plants perish. He spreads the sacrificial strew; therefore the plants again revive. He spreads over the strew the upper strew. The strew is the people; the upper strew is the sacrificer; verily he makes the sacrificer higher than the man who does not sacrifice; therefore the sacrificer is higher than the man who does not sacrifice. If a weak man take up a burden, he breaks up into pieces. If there were twelve Upasads in the one-day rite, and three in the Ahina, the sacrifice would be upset. There are three Upasads in the one-day rite, twelve in the Ahina, to preserve the strength of the sacrifice; thus it is in order. One teat (of the cow) is used for a child, for that is fortunate. So he takes one teat for his milk drink, then two, then three, then four. That [1] is the razor-edged drink by which he drives away his foes when born and repels them when about to be born; verily also with the smaller he approaches the greater. He takes the four teats first for his drink, then three, then two, then one. That is the drink called 'of a beatific back', full of fervour, and of heavenly character; verily also is he propagated with children and cattle. Gruel is the drink of the Rajanya; gruel is as it were harsh; the Rajanya is as it were harsh [2], it is the symbol of the thunderbolt, (and serves) for success. Curds (is the drink) of the Vaiçya, it is the symbol of the sacrifice of cooked food, (and serves) for prosperity.