Shatapatha Brahmana 14.3.1.28

14.3.1.28

atha prāṅivodaṅṅutkrāmati udvayaṃ tamasasparīti pāpmā vai tamaḥ pāpmānameva tamo'pahate svaḥ paśyanta uttaramityayam vai loko'dbhya uttaro'sminneva loke pratitiṣṭhati devaṃ devatrā sūryamaganma jyotiruttamamiti svargo vai lokaḥ sūryo jyotiruttamaṃ svarga eva loke'ntataḥ pratitiṣṭhatyanapekṣametyāhavanīye samidhamabhyādadhāti samidasi tejo'si tejo mayi dhehītyāśiṣamevaitadāśāste

He (the Sacrificer) then steps out towards the north-east, with (Vâg. S. XXXVIII, 24), 'From out of the gloom have we risen,'--gloom is evil: it is gloom, evil, he thus drives away;--'beholding the higher light,'--this (terrestrial) world is higher than the water: it is on this world he thus establishes himself;--'God Sûrya, with the gods, the highest light,'--Sûrya, the highest light, is the heavenly world: it is in the heavenly world he thus finally establishes himself. He walks along without looking back, and puts a log of wood on the Âhavanîya, with (Vâg. S. XXXVIII, 25), 'A kindler thou art, fire thou art: lay thou fire into me!' it is a blessing he thereby invokes.