Shatapatha Brahmana 10.5.4.17

10.5.4.17

abhram purīṣam candramā āhutayo nakṣatrāṇi samidho yaccandramā nakṣatre vasatyāhutistatsamidhi vasatyetadu vā āhuterannameṣā pratiṣṭhā tasmādāhutirna kṣīyata etaddhyasyā annameṣā pratiṣṭhātha yaddevā ityākhyāyate tallokampṛṇā tadvā etatsarvaṃ devā ityevākhyāyate

The welkin is the earth-fillings (between the layers of brick); the moon the oblations; the Nakshatras (lunar mansions) the fire-logs,--because the moon resides in (or with) the Nakshatra, therefore the oblation resides in the fire-wood: that, indeed, is the food of the oblation, and its support; whence the oblation does not fail (na kshîyate), for that is its food and its support And what are called 'the gods' they are the space-filling (brick); for by (naming) the gods everything here is named.
18 It is regarding this that it is said by the Rik (X, 12, 3), 'The All-gods have gone after this thy Yagus,'--for all beings, all the gods, indeed, become the Yagus here. Thus this whole Agni comes to be the space-filler; and, verily, whosoever knows this, thus comes to be that whole (Agni) who is the space-filler.