Śatapatha Brāhmaṇa ("of a hundred paths") 14.2.1.4

14.2.1.4

atho imau vai lokau rauhiṇau ādityaḥ pravargyo'muṃ tadādityamābhyāṃ lokābhyām parigṛhṇāti tasmādeṣa ābhyāṃ lokābhyām parigṛhītaḥ

And, indeed, the Rauhinas are also these two worlds, and the Pravargya is the sun: he thus encompasses yonder sun by these two worlds, whence he is encompassed by these two worlds.