Śatapatha Brāhmaṇa ("of a hundred paths") 6.5.1.2

6.5.1.2

tā upasṛjati | āpo hi ṣṭhā mayobhuva iti yāṃ vai devatāmṛgabhyanūktā yāṃ yajuḥ saiva devatā sa 'rkṣo devatā tadyajustā haitā āpa evaiṣa tricastadyā amūrāpa ekaṃ rūpaṃ samadṛśyanta tā etāstadevaitadrūpaṃ karoti

He pours it on (the clay), with (Vâg. S. XI, 50-52; Rik S. X, 9, 1-3), 'Refreshing ye are, O waters!' To whatever deity a Rik-verse, and to whatever deity a Yagus formula applies, that Rik-verse is that very deity, and that Yagus formula is that very deity: hence this triplet (XI, 50-52) is these waters, and they are those very waters which appeared as one form: that form he now makes it.