Śatapatha Brāhmaṇa ("of a hundred paths") 8.6.3.21

8.6.3.21

ayamagnirvīratamo vayodhā iti | ayamagnirvīryavattamo vayodhā ityetatsahasriyo dyotatāmaprayucanniti sahasriyo dīpyatāmapramatta ityetadvibhrājamānaḥ sarirasya madhya itīme vai lokāḥ sariraṃ dīpyamāna eṣu lokeṣvityetadupa pratyāhi divyāni dhāmetyupa prayāhi svargaṃ lokamityetat

[The fourth brick, with, Vâg. S. XV, 52], 'This Agni, the most mettlesome bestower of strength,'--that is, 'the most vigorous bestower of strength; may he glow a thousandfold, unremitting,'--that is, 'may he shine a thousandfold, not unheedful;'--'blazing in the middle of the sea,'--the sea, doubtless, means these worlds: thus, 'shining in these worlds;'--'go forth to the divine abodes!'--that is, 'go forth to the heavenly world!'