Śatapatha Brāhmaṇa ("of a hundred paths") 14.1.3.3

14.1.3.3

brahma jajñānam prathamam purastāditi asau vā ādityo brahmāharahaḥ purastājjāyata eṣa u pravargyastadetamevaitatprīṇāti tasmādāha brahma jajñānam prathamam purastādityatha prokṣatyasāveva bandhuḥ

[Vâg. S. XIII, 3,] ‘The Brahman, firstborn from afore,--the Brahman, doubtless, is yonder sun, and he is born day by day from afore (in the east); and the Pravargya also is that (sun): it is him he thus gratifies, and therefore he says, 'The Brahman (n.), firstborn from afore.' He then sprinkles (the vessels): the import of this is the same as before.