Chandogya Upanishad 5.10.1

5.10.1

tad ya itthaṃ viduḥ \
ye ceme araṇye śraddhā tapa ity upāsate \
te arciṣam abhisaṃbhavanti \
arciṣo 'haḥ \
ahna āpūryamāṇapakṣam \
āpūryamāṇapakṣād yān ṣaḍ udaṅṅ eti māsāṃs tān \\510.1\

Among them,footnote{From among these householders who aspire after the higher regions and those who are entitled to the knowledge of the five fires. Now, another question, namely, where people go from here, is being answered.} those who know thusfootnote{That is, those who know the doctrine of the five fires described above, which teaches that we are produced gradually from the fires of the heavenly and other regions and are of the nature of fire, having our essence in the five fires.} (this knowledge of the five fires)footnote{The unseen results generated from the oblations of Agnihotra etc. turn into the universe. Dividing} and those who are devoted to faith and austerity in the forest—they go to light; from light to the day, from the day to the bright fortnight, from the bright fortnight to those six months during which the sun travels northward; from the months to the year, from the year to the sun, from the sun to the moon and from the moon to the lightning. (From the region of Brahman) a person, who is other than human, (comes and) causes them, existing there, to attain Brahman. This is the path of the gods.