Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.4.16

3.2.4.16

athopaniṣkramyābhimantrayate | cidasi manāsīti cittaṃ vā idam mano vāganuvadati dhīrasi dakṣiṇeti dhiyā-dhiyā hyetayā manuṣyā jujyūṣantyanūkteneva prakāmodyeneva gāthābhiriva tasmādāha dhīrasīti dakṣiṇeti dakṣiṇā hyeṣā kṣatriyāsi yajñiyāsīti kṣatriyā hyeṣā yajñiyā hyeṣāditirasyubhayataḥśīrṣṇīti sa yadenayā samānaṃ sadviparyāsaṃ vadati yadaparaṃ tatpūrvaṃ karoti yatpūrvaṃ tadapara ṃ tenobhayataḥśīrṣṇī tasmādāhāditirasyubhayataḥśīrṣṇīti

Having gone up to her, he (the Adhvaryu) salutes her, with the text (Vâg. S. IV, 19), 'Thou art thought, thou art the mind,'--for speech, doubtless, speaks in accordance with thought, with the mind;--'Thou art intelligence, thou art the Dakshinâ,'--for it is by means of their respective intelligence that people seek to make their living, either by reciting (the Veda), or by readiness of speech, or by songs: therefore he says, 'Thou art intelligence;' and 'Dakshinâ' (gift to the priests) he calls her, because she is indeed the Dakshinâ;-- 'Thou art supreme, thou art worthy of worship,'--for she is indeed supreme and worthy of worship;--'Thou art Aditi, the double-headed,'--inasmuch as, through her (Vâk, speech), he speaks the right thing wrongly, and puts last what comes first, and first what comes last, therefore she is double-headed: that is why he says, 'Thou art Aditi, the double-headed.'