Śatapatha Brāhmaṇa ("of a hundred paths") 8.7.3.8

8.7.3.8

tadāhuḥ | yatsarvaiścandobhiḥ sarvābhirdevatābhiriṣṭakā upadadhātyathaitadekayaikadevatyayā nivapati kathametadardhamagneritīndro vai sarvāndevānpratistadyadaindryā nivapati tenaitadardhamagneratha yadanuṣṭubhā vāgvā anuṣṭubvāgu sarvāṇi candāṃsi teno evārdham

Here, now, they say, 'Whilst he lays down the bricks with all kinds of metres, and with (verses addressed to) all deities, he now scatters (the soil) with a single (verse) addressed to a single deity,--how is this one half of Agni?' Indra, surely, is equal to all the gods; hence in that he scatters it with a (verse) addressed to Indra, this (soil) is one half of Agni. And as to its being (done) with an anushtubh verse,--the Anushtubh is speech, and all metres are speech: thereby also it is one half.