Shatapatha Brahmana 7.5.2.27

7.5.2.27

citraṃ devānāmudagādanīkamiti | asau vā āditya eṣa puruṣastadetaccitraṃ devānāmudetyanīkaṃ cakṣurmitrasya varuṇasyāgnerityubhayeṣāṃ haitaddevamanuṣyāṇāṃ cakṣurāprā dyāvāpṛthivī antarikṣamityudyanvā eṣa imāṃlokānāpūrayati sūrya ātmā jagatastasthuṣaścetyeṣa hyasya sarvasyātmā yacca jagadyacca tiṣṭhati

[Vâg. S. XIII, 46; Rik S. I, 115, 1] 'The brilliant front of the gods hath risen,' for that man is yonder sun, and he indeed rises as the brilliant front (face) of the gods;--'the eye of Mitra, Varuna, and Agni,' for that (sun) is the eye of both gods and men;--'he hath filled heaven, and earth, and the air,' for when he rises he indeed fills these worlds;--'Sûrya, the soul of the movable and immovable;' for that (sun) is indeed the soul of everything here that moves and stands.