Śatapatha Brāhmaṇa ("of a hundred paths") 9.2.3.25

9.2.3.25

prācīmanu pradiśam prehi vidvāniti | prācī vai digagneḥ svāmanu pradiśam prehi vidvānityetadagneragne puro agnirbhavehetyasya tvamagneragne puro 'gnirbhavehetyetadviśvā āśā dīdyāno vibhāhīti sarvā āśā dīpyamāno vibhāhītyetadūrjaṃ no dhehi dvipade catuṣpada ityāśiṣamāśāste

'Go thou forth to the eastern quarter, knowing!'--the eastern quarter, doubtless, is Agni's: thus, 'To thine own quarter go thou forth, knowing!'--'be thou Agni's fore-fire here, O Agni!'--that is, 'Of this Agni (kitya) be thou, O Agni, the fore-fire!'--'Shine thou, illumining all regions!'--that is, 'shine thou, illuminating every region!'--'Grant thou food to our two-footed and four-footed one!' he thereby invokes a blessing.