ChU 5.4.1
असौ वाव लोको गौतमाग्निः । तस्यादित्य एव समित् । रश्मयो धूमः । अहर् अर्चिः । चन्द्रमा अङ्गाराः । नक्षत्राणि विस्फुलिङ्गाः
asau vāva loko gautamāgniḥ | tasyāditya eva samit | raśmayo dhūmaḥ | ahar arciḥ | candramā aṅgārāḥ | nakṣatrāṇi visphuliṅgāḥ
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'The altar (on which the sacrifice is supposed to be offered) is that world (heaven), O Gautama; its fuel is the sun itself, the smoke his rays, the light the day, the coals the moon, the sparks the stars.
Translated by F. Max Müller