Śatapatha Brāhmaṇa ("of a hundred paths") 1.8.3.4

1.8.3.4

yadyu adhvaryuḥ | indrāgnyorujjitimanūjjayatvayaṃ yajamāno vājasyainam prasavena prohāmīndrāgnī tamapanudatāṃ yamayaṃ yajamāno dveṣṭi yaścainaṃ dveṣṭi vājasyainam prasavenāpohāmītyamāvāsyāyāmaindrāgnaṃ hyāmāvāsyaṃ havirbhavatyevaṃ yathādevataṃ vyūhati tadyadevaṃ vyūhati

And if the Adhvaryu (does it, he says), 'May this sacrificer be victorious after the victory of Indra and Agni! with the impetus of the food I urge him on;' and, 'May Indra and Agni drive him away whom this sacrificer hates, and who hates him! with the impetus of the food I drive him away.' Thus he says at the new-moon sacrifice, because the new-moon offering belongs to Indra and Agni. And in this manner he separates (the spoons) according to the respective deities, This is why he thus separates them: