Śatapatha Brāhmaṇa ("of a hundred paths") 4.3.1.2

4.3.1.2

tamindrāgnī anusamatanutām | prajānām prajātyai tasmādaindrāgno 'cāvākaḥ sa etena ca haviṣā yadasmā etatpuroḍāśabṛgalam pāṇāvādadhātyetena cārṣeyeṇa yadetadanvāha tenānusamaśnute

Indra and Agni preserved him for the production of creatures, whence the Akhâvâka priest belongs to Indra and Agni. But it is by means of that sacrificial food, the piece of cake which he now puts in his hand, and by means of that (saying) of the seers which he now recites, it is thereby they (Indra and Agni) preserve him.