Shatapatha Brahmana 1.2.1.21

1.2.1.21

sa yadāha | prāṇāya tvodānāya tveti tatprāṇodānau dadhāti vyānāya tveti tadvyānaṃ dadhāti dīrghāmanu prasitimāyuṣe dhāmiti tadāyurdadhāti devo vaḥ savitā hiraṇyapāṇiḥ pratigṛbhṇātvacidreṇa pāṇinā supratigṛhītānyasanniti cakṣuṣe tveti taccakṣurdadhātyetāni vai jīvato bhavantyevamu haitajjīvameva devānāṃ havirbhavatyamṛtamamṛtānāṃ tasmādevam pinaṣṭi piṃṣanti piṣṭānyabhīndhate kapālāni

When he now says: 'For out-breathing thee! for in-breathing thee!' he thereby again imparts out-breathing and in-breathing (to it), and by saying 'for through-breathing thee!' he imparts through-breathing (to it). By 'may I impart a long duration to the life!' he bestows life on it. By 'may the divine Savitri, the golden-handed, receive thee with a flawless hand!' he says: 'May they be well received!' By 'for the eye thee!' he bestows eye-sight on it. Now these (attributes) are those of a living being; and thus that sacrificial food for the gods is indeed living, is amrita (ambrosia, or not dead) for the immortals. This is the reason why he thus grinds (the rice). (Whilst) they are grinding the (ground) grains, (and whilst) they are heating the potsherds,--