Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.4.10

3.2.4.10

tāṃ yathaivādo devāḥ | prāhiṇvantsomamacaivamevaināmeṣa etatprahiṇoti somamaca vāgvai somakrayaṇī nidānena tāmetayāhutyā prīṇāti prītayā somaṃ krīṇānīti

And as the gods then sent her (Vâk) to Soma, so does he now send her to Soma; and the cow for which the Soma is bought being in reality Vâk, it is her he gratifies by this offering, thinking, 'With her, when gratified, I shall buy the Soma.'