YV 5.5a

The Piling of the Fire Altar (continued) In that he completes (the sacrifice) with one animal, (it is) for the continuity of the sacrifice and to avoid cutting it in two. The male animals belong to Indra; in that being Indra's they are offered to the fires, he causes strife among the deities. He should use Tristubh verses, appertaining to Agni, for the Yajyas and Anuvakyas; in that they appertain to Agni, (the verses) are Agni's, in that they are Tristubhs (they are) Indra's; (verily they serve) for prosperity; he does not cause strife among the deities. To Vayu of the team he offers a hornless (animal); Vayu is the brilliance of Agni; it is offered to brilliance; therefore wheresoever the wind [1] blows, the fire burns; verily it follows its own brilliance. If he were not to offer to him of the team, the sacrificer would go mad; (an offering) is made to him of the team, to prevent the sacrificer going mad. The Yajya and the Anuvakya, contain (the words) 'wind' and 'white', to secure brilliance. 'The golden germ first arose', (with these words) he pours out the butter portion; the golden germ is Prajapati; (verily it serves) for likeness to Prajapati. This (animal) is slain to make up all forms of animals; its hairs are [2] the form of man, its lack of horns that of horses, the possession of one set of incisors only that of cows, the sheep-like hooves that of sheep, that it is a goat, that is the form of goats. The wind is the abode dear to cattle; in that it is offered to Vayu, in accord cattle wait upon him. 'Should an animal be offered to Vayu, or to Prajapati?' they say; if he were to offer it to Vayu, he would depart from Prajapati; if he were to offer it to Prajapati, he would depart from Vayu [3]; in that the animal is offered to Vayu, therefore he does not depart; in that a cake is offered to Prajapati, therefore he does not depart from Prajapati; in that it is offered on twelve potsherds, therefore he does not depart from Vaiçvanara.