Shatapatha Brahmana 6.5.4.3

6.5.4.3

aditiṣṭvā devī viśvadevyāvatī | pṛthivyāḥ sadhasthe aṅgirasvatkhanatvavaṭetyavaṭo haiṣa devatrātra sā vaiṇavyabhrirutsīdati catuḥsraktireṣa kūpo bhavati catasro vai diśaḥ sarvābhya evainametaddigbhyaḥ khanatyatha racanamavadhāyāṣāḍhāmavadadhāti tūṣṇīmeva tāṃ hi pūrvāṃ karoti

[Vâ,. S. XI, 61] 'May the divine Aditi, clear to all the gods, dig thee, Aṅgiras-like, O hole, in the lap of the earth!'--for this hole (is dug) among the gods. That bamboo spade now disappears. This hole is four-cornered, for there are four quarters: he thus digs it from all the quarters. Having then laid down fuel in it, he silently puts the 'invincible' (brick) thereon, for that is made first.