Shatapatha Brahmana 7.5.1.31

7.5.1.31

iṣe rāye ramasva | sahase dyumna ūrje apatyāyetyetasmai sarvasmai ramasvetyetatsamrāḍasi svarāḍasīti samrāṭca hyeṣa svarāṭca sārasvatau tvotsau prāpavatāmiti mano vai sarasvānvākṣarasvatyetau sārasvatā utsau tau tvā prāvatāmityetaddvābhyāmupadadhāti tasyokto bandhuratho dvayaṃ hyevaitadrūpam mṛccā paśca sādayitvā sūdadohasādhivadati tasyokto bandhuḥ

'For sap, for wealth, do thou rest, for might in glory, for strength, for offspring!' that is, for all that do thou rest!--'all-ruling thou art, self-ruling thou art!' for both all-ruling and self-ruling he (Agni) indeed is;--'may the two Sârasvata wells cheer thee!' Sarasvat (m.) is the Mind, and Sarasvatî (f.) Speech,--these two are the Sârasvata wells: thus, may these two cheer thee! With two (formulas) he sets it down: the significance of this has been explained; and, moreover, twofold is that form, (consisting as it does of) clay and water. Having 'settled' it, he pronounces the Sûdadohas on it: the significance of this has been explained.