Śatapatha Brāhmaṇa ("of a hundred paths") 7.2.1.19

7.2.1.19

yadvevopatiṣṭhate | ayaṃ vai loko gārhapatyaḥ pratiṣṭhā vai gārhapatya iyamu vai pratiṣṭhāthaitadapathamivaiti yadetāṃ diśameti tadyadupatiṣṭhata imāmevaitatpratiṣṭhāmabhipratyaityasyāmevaitatpratiṣṭhāyām pratitiṣṭhati

And again, why he stands by (the fire). The Gârhapatya (hearth) is this (terrestrial) world; for the Gârhapatya is a foundation, and the foundation doubtless is this (earth). Now when he goes into that direction, he goes where there is no path; and when he stands by (the fire), he thereby returns to this (earth), the foundation, and establishes himself upon this foundation.