Shatapatha Brahmana 8.5.3.3

8.5.3.3

raśminā satyāya satyaṃ jinveti | eṣa vai raśmirannaṃ raśmiretaṃ ca tadrasaṃ ca saṃdhāyātmanprapādayate pretinā dharmaṇā dharmaṃ jinvetyeṣa vai pretirannam pretiretaṃ ca tadrasaṃ ca saṃdhāyātmanprapādayate 'nvityā divā divaṃ jinvetyeṣa vā anvitirannamanvitiretaṃ ca tadrasaṃ ca saṃdhāyātmanprapādayate tadyadyadetadāha tacca tadrasaṃ ca saṃdhāyātmanprapādayate 'munādo jinvādo 'syamuṣmai tvādhipatinorjorjaṃ jinveti tredhāvihitāstredhāvihitaṃ hyannam

[He lays them down, with, Vâg. S. XV, 6. 7], 'By the ray quicken thou the truth for truth!'--the ray, doubtless, is that (sun), and ray is food; having put together that (sun) and the essence thereof, he makes it enter his own self;--'by the starting, by the law, quicken the law!'--the starting, doubtless, is that (sun), and the starting also means food: having put together that (sun) and the essence thereof, he makes it enter his own self;--'by the going after, by the sky, quicken the sky!'--the going after, doubtless, is that (sun), and the going after also means food; having put together that (sun) and the essence thereof, he makes it enter his own self. Thus whatever he mentions here, that and the essence thereof he puts together and makes it enter his own self: 'By such and such quicken thou such and such!'--'Such and such thou art: for such and such (I deposit) thee!'--'By the lord, by strength, quicken strength!' thus they (the bricks) are divided into three kinds, for food is of three kinds.