Śatapatha Brāhmaṇa ("of a hundred paths") 2.1.4.29

2.1.4.29

atha sarparājñyā ṛgbhirupatiṣṭhate | āyaṃ gauḥ pṛśnirakramīdasadanmātaram puraḥ pitaraṃ ca prayantsvaḥ antaścarati rocanāsya prāṇādapānatī vyakhyanmahiṣo divam triṃśaddhāma virājati vākpataṅgāya dhīyate prati vastoraha dyubhiriti tadyadevāsyātra sambhārairvā nakṣatrairvartubhirvādhānena vānāptam bhavati tadevāsyaitena sarvamāptam bhavati tasmātsarparājñyā ṛgbhirupatiṣṭhate

He stands worshipping by (the fire) while muttering the (three) Rik-verses of the queen of serpents (Vâg. S. III, 6-8),--'Hither has come that spotted bull and has settled down before the mother; and before the father on going up to heaven.--She moves along through the luminous spheres, breathing forth from his breath: the mighty (bull) has illumined the sky.--He rules over the thirty domains; and song is bestowed on the winged one, yea, with the light at the break of day!' Thus he recites; and whatever (benefit) has not been obtained by him either through the equipments, or through the asterisms, or through the seasons, or through the laying down of the fire, all that is thereby obtained by him; and for this reason he stands worshipping by (the fire), while muttering the verses of the queen of serpents.