Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 21.6.8

21.6.8

jyotiḥ prathamam ahar upayanti /

xxi. 5. They say 'Why are (the litanies) for the All-gods expanded, and not those for one deity or for two deities?' No exhaustion arises through that for one deity or that for two deities, but exhaustion does arise through that for the All-gods; therefore those for the All-gods only are expanded, to secure the might of these days, to prevent exhaustion of the Abhiplavas. They perform the Jyotis as the first day, with the symbol of the one day (rite), for the one day (rite) is the light of the other days; the Go as the