Śatapatha Brāhmaṇa ("of a hundred paths") 9.2.3.16

9.2.3.16

sa eṣa prāṇaḥ | prāṇamevaitadātmandhatte tadetadāyurāyurevaitadātmandhatte tadetadannamāyurhyetadannamu vā āyuraśmā bhavati sthiro vā aśmā sthiraṃ tadāyuḥ kurute pṛśnirbhavati pṛśnīva hyannam

This (stone) is the breath,--he thus puts the breath into the body; and it is the vital power,--he thus puts vital power into the body; it is food, for it is vital power, and vital power is indeed food. It is a stone, for a stone is firm: he thus makes the vital power firm. It is variegated, for food is variegated (varied).