Śatapatha Brāhmaṇa ("of a hundred paths") 2.3.2.5

2.3.2.5

atha prātaḥ | anaśitvā muhūrtaṃ sabhāyāmāsitvāpi kāmam palyayeta tadeva tasyopasthānamatha yatraiva bhasmoddhṛtamupanigacettadeva tasyopasthānamevamu hāsyaitā devatā upasthitā bhavanti

And again, before taking food in the morning, having sat down for a moment in the hall, he may also, if he like, walk round (the Sabhya or hall-fire),--and this is the homage rendered to that (fire). And when he steps near where lie the ashes removed (from the fire-places) that is the homage rendered to that (fire). And thus homage has been rendered to those deities of his.