YV 6.3g

He should think of any one whom he hates; verily does he inflict trouble upon him. The theologians say, 'Thou hast sprinkled the offerings with water; but the waters with what?' 'With the holy power (Brahman)', he should say, for verily he sprinkles the offerings with water, and the waters with the holy power (Brahman). He sprinkles the kindling-wood and the sacrificial strew; verily he makes it pure. He sprinkles the altar, the altar was rough, hairless, and impure; verily he makes it pure. 'To the sky thee, to the atmosphere thee, to earth thee', (with these words) he places the sacrificial strew and sprinkles it [1]; verily he sprinkles it for these worlds. Cruelly indeed does he act in that he digs. He pours down the waters, for healing. He takes the bunch in front; verily he makes it the chief. He takes so much as is measured by Prajapati as the mouth of the sacrifice. He spreads the sacrificial strew, the sacrificial strew is offspring, the altar is the earth; verily he places offspring on the earth. He strews it so as not to be very discernible; verily he makes him not very discernible by offspring and cattle [2]. He puts the bundle over the sacrificial strew, the strew is offspring, the bundle the sacrificer; verily he makes the sacrificer superior to the non-sacrificer. Therefore the sacrificer is superior to the non-sacrificer. He puts (grass) between, for separation. He anoints it; verily he makes it into an offering and causes it to go to the world of heaven. He anoints it in three places; these worlds are three; verily he anoints it for these worlds. He does not break off (its edges); if he were to break them off, it would not go aloft for the sacrificer. He pushes it upwards as it were [3], for the world of heaven is upwards as it were. He depresses it; verily he brings down rain for him. He should not put forward the points too much; if he were to do so, there would be a violent torrent to destroy the Adhvaryu.