YV 1.6p

The theologians say, 'Should the Soma be clarified or not?' Soma indeed is the king of plants; whatever falls upon it is swallowed by it. If be were to clarify it, it would be as when one expels from the mouth what has been swallowed; if he were not to clarify it, it would be as when something falls upon the eye and moves to and fro; the Adhvaryu would be hungry, the sacrificer would be hungry. 'O Soma-seller, purify the Soma', he should say; so whether it be the one [1] or the other '. he involves the Soma-seller in both (faults), and therefore the Soma-seller is hungry. Aruna Aupaveçi said, 'At the buying of the Soma I win the third pressing.' He measures (the Soma) on the skin of beasts verily he wins cattle, for cattle are the third pressing. If he desire of a man, 'May he be without cattle', he should measure it for him on the rough side. The rough side indeed is not connected with cattle; verily he becomes without cattle. If he desire of a man, 'May he be rich in cattle' [2], he should measure for him on the hairy side. That indeed is the form of cattle; verily by the form he obtains cattle for him; verily he becomes rich in cattle. He buys it at the end of the waters; verily he buys it with its sap. 'Thou art a home dweller', he says; verily he makes it at home. 'Thy libation is bright', he says; for bright is its libation. He advances (for it) with a cart; verily he advances to its mightiness. He advances with a cart [3], therefore what lives on the level is to be borne by a cart. Where, however, they bear it on their heads, therefore what lives on the hill is to be borne on the head. With a verse, 'That god, Savitr', in the Atichandas metre he measures. The Atichandas is all the metres; verily with all the metres he measures it. The Atichandas is the highest of the metres. In that he measures with a verse in the Atichandas metre, he makes it the highest of its peers.