Śatapatha Brāhmaṇa ("of a hundred paths") 1.8.3.2

1.8.3.2

yadyu adhvaryuḥ | agnīṣomayorujjitimanūjjayatvayaṃ yajamāno vājasyainam prasavena prohāmyagnīṣomau tamapanudatāṃ yamayaṃ yajamāno dveṣṭi yaścainaṃ dveṣṭi vājasyainam prasavenāpohāmīti paurṇamāsyāmagnīṣomīyaṃ hi paurṇamāsaṃ havirbhavati

And if the Adhvaryu (does it, he says), 'May this sacrificer be victorious after the victory of Agni and Soma! with the impetus of the food I urge him on;' and, 'May Agni and Soma drive him away whom this sacrificer hates, and who hates him! with the impetus of the food I drive him away.' Thus he does at the full-moon sacrifice, because the full-moon offering belongs to Agni and Soma.