Śatapatha Brāhmaṇa ("of a hundred paths") 7.4.2.6

7.4.2.6

prajāpatiṣṭvā sādayatviti | prajāpatirhyetām prathamāṃ citimapaśyadapām pṛṣṭhe samudrasyemannityapāṃ hīyam pṛṣṭhaṃ samudrasya hīyamema vyacasvatīm prathasvatīmiti vyacasvatī ca hīyam prathasvatī ca prathasva pṛthivyasīti prathasva pṛthivī cāsītyetat

[Vâg. S. XIII, 17] 'May Pragâpati settle thee'--for Pragâpati saw this first layer;--'on the back of the waters, on the way of the ocean,' the back of the waters doubtless is this earth, and the way of the ocean is this earth;--'thee, the wide, the broad one!' for this earth is both wide and broad;--'broaden thou: thou art the broad one!' that is, 'broaden thou, and thou art the broad (earth, prithivî).'