Shatapatha Brahmana 7.1.1.23

7.1.1.23

agne yatte divi varca iti | ādityo vā asya divi varcaḥ pṛthivyāmityayamagniḥ pṛthivyāṃ yadoṣadhīṣvapsvā yajatreti ya evauṣadhiṣu cāpsu cāgnistametadāha yenāntarikṣamurvātatantheti vāyuḥ sa tveṣaḥ sa bhānurarṇavo nṛcakṣā iti mahāntsa bhānurarṇavo nṛcakṣā ityetat

[The second brick, with Vâg. S. XII, 48] 'O Agni, what splendour is thine in the heaven,'--his splendour in the heaven doubtless is the sun;--'on earth,' that on earth is this fire;--'and that which is in the plants, in the waters, O holy one!' he thereby means the fire that is both in the plants, and in the waters;--'wherewith thou hast overspread the wide air,'--that is, the wind;--'brilliant is that light, surging, man-viewing;' that is, 'great is that light, surging, man-viewing.'