Śatapatha Brāhmaṇa ("of a hundred paths") 9.3.2.4

9.3.2.4

tadvā araṇye 'nūcye | vāgvā araṇye 'nūcyo vāco vā annamadyate 'tho vācā vā abhiṣicyamāno 'bhiṣicyate tadetatsarvaṃ vasu sarve hyete kāmāḥ saiṣā vasumayo dhārā yathā kṣorasya vā sarpiṣo vaivamārabhyāyaiveyamājyāhutirhūyate tadyadeṣā vasumayī dhārā tasmādenāṃ vasodhāretyācakṣate

And, furthermore, (it is offered) upon the Aranyeऽnûkya; for the Aranyeऽnûkya is speech, and it is through (the channel of) speech that food is eaten; and, besides, it is with speech that he who is anointed is anointed. And everything here is wealth (vasu), for all these (cake-offerings) are (connected with special) wishes; and in order that this shower, be it of milk or of ghee, (may be) fraught with wealth, this oblation of ghee is thus offered for the beginning; and inasmuch as this shower is fraught with wealth, it is called 'shower of wealth.'