Śatapatha Brāhmaṇa ("of a hundred paths") 10.5.2.20

10.5.2.20

sa etaiḥ suptaḥ na kasya cana veda na manasā saṃkalpayati na vācānnasya rasaṃ vijānāti na prāṇena gandhaṃ vijānāti na cakṣuṣā paśyati na śrotreṇa śṛṇotyetaṃ hyete tadāpītā bhavanti sa eṣa ekaḥ sanprajāsu bahudhā vyāviṣṭastasmādekā satī lokampṛṇā sarvamagnimanuvibhavatyatha yadeka eva tasmādekā

That same (divine person), the Adhvaryus (Yagur-veda priests) serve under the name of 'Agni' (fire-altar) and 'Yagus,' because he holds together (yug) all this (universe); the Khandogas (Sâma-veda priests, chanters) under that of 'Sâman,' because in him all this (universe) is one and the same (samâna); the Bahvrikas (Rig-veda priests, Hotars) under that of 'Uktham,' because he originates (utthâp) everything here; those skilled in sorcery, under that of 'sorcery (yâtu),' because everything here is held in check (yata) by him; the serpents under that of 'poison;' the snake-charmers under that of 'snake;' the gods under that of 'ûrg (strengthening food);' men under that of 'wealth;' demons under that of 'mâyâ (magic power);' the deceased Fathers under that of 'svadhâ (invigorating draught);' those knowing the divine host under that of 'divine host;' the Gandharvas under that of 'form (rûpa);' the Apsaras under that of 'fragrance (gandha),'--thus, in whatsoever form they serve him that indeed he becomes, and, having become that, he is helpful to them; whence he who knows should serve him in all these (forms), for he becomes all that, and, having become all that, he is helpful to him.