Shatapatha Brahmana 11.7.2

Now there is one animal sacrifice of the Haviryagña order, and another of the order of the Soma-sacrifice. Of the Haviryagña order is that at which he (the Adhvaryu) brings him fast-food, leads water forward, and pours out a jarful of water, and at which (the Sacrificer) strides the Vishnu-strides; and of the order of the Soma-sacrifice is that (animal sacrifice) at which these (rites) are not performed.

Concerning this they ask, 'Is the animal sacrifice an ishti or a great (Soma-) sacrifice?'--'A great sacrifice,' let him say; 'for in that (other) case thou hast made the animal sacrifice an ishti, and shattered it.' Thus he should say to him.

Its fore-offerings are the morning-service, its after-offerings the evening-service, and its sacrificial cake the midday-service.

Now, some bring up the Dakshinâs (presents to the priests) when the omentum has been offered; but let him not do so, for if, in that case, any one were to say of him, 'Surely, this (Sacrificer) has brought the Dakshinâs outside of the vital airs (or, of life), he has not strengthened his vital airs: he will become either blind, or lame, or deaf, or paralyzed on one side;' then that would indeed he likely to come to pass.

Let him perform it in this way:--when the Idâ of the cake-offering has been invoked, he should bring up the Dakshinâs; for to Indra belongs this vital air in the centre (of the body): by means of the Dakshinâs he thus strengthens this vital air in the centre (of the body); and to Indra also belongs the midday Soma-service, and at the midday-service the Dakshinâs are brought up: therefore. he should bring up the Dakshinâs after the invocation of the Idâ of the cake-offering.

Here now they say, 'Seeing that the want of the purificatory bath in the case of the initiated is improper, Adhvaryu, when didst thou initiate him?' Well, let them sustain him till the purificatory bath,--to wit, the Adhvaryu, the Pratiprasthâtri, the Hotri, the Maitrâvaruna, the Brahman, and the Âgnîdhra, for it is through these that this (formula) is called 'shaddhotri ': having rapidly muttered that 'shaddhotri,' he offers, performing either one or five oblations of ghee,--'The heaven is his back, the air his body, O Vâkaspati, by his limbs he gave rise to the sacrifice, by his forms to the earth; by his flawless voice and his flawless tongue to the god-gladdening invocation, Hail!' This, indeed, is his initiation.

As to this they say, 'Seeing that the want of the purificatory bath in the case of the initiated is improper, Adhvaryu, when didst thou take him down to the purificatory bath?' Well, when they perform with the heart-spit, that is his purificatory bath.

Madhuka Paiṅgya once said, 'Some perform the animal sacrifice without Soma, and others do so with Soma. Now, Soma was in the heavens, and Gâyatrî, having become a bird, fetched him; and inasmuch as one of his leaves (parna) was cut off, that was how the Parna-tree arose:' such, indeed, is (the passage in) the Brâhmana that is told. And some, it is true, perform the animal sacrifice without Soma, and others with Soma; for he who makes the sacrificial stake other than of Palâsa wood, performs the animal sacrifice without Soma; and he who makes the sacrificial stake of Palâsa performs the animal sacrifice with Soma: therefore let him make his sacrificial stake of Palâsa wood.