Śatapatha Brāhmaṇa ("of a hundred paths") 2.1.4.30

2.1.4.30

tadāhuḥ | na sarparājñyā ṛgbhirupatiṣṭhetetīyaṃ vai pṛthivī sarparājñī sa yadevāsyāmādhatte tatsarvān kāmānāpnoti tasmānna sarparājñyā ṛgbhirupatiṣṭheteti

They say, however, that one need not stand by (the fire) worshipping with the verses of the queen of serpents. For the queen of serpents, they argue, is this earth; and accordingly when he lays down the fire on her, he thereby obtains all his desires: hence he need not stand by (the fire) worshipping with the verses of the queen of serpents.