Śatapatha Brāhmaṇa ("of a hundred paths") 8.2.1.8

8.2.1.8

tā etā diśaḥ | tā retaḥsicorvelayopadadhātīme vai retaḥsicāvanayostaddiśo dadhāti tasmādanayordiśaḥ sarvata upadadhāti sarvatastaddiśo dadhāti tasmātsarvato diśaḥ sarvataḥ samīcīḥ sarvatastatsamīcīrdiśo dadhāti tasmātsarvataḥ samīcyo diśastā nānopadadhāti nānā sādayati nānā sūdadohasā 'dhivadati nānā hi diśaḥ

These (bricks) are those regions (quarters); he places them on the range of the two retahsik (bricks), for the retahsik are these two (worlds): he thereby places the regions within these two (worlds), whence there are regions within these two (worlds). He lays down (these bricks) in every direction: he thus places the regions in all (the four) directions, whence the regions are in all directions. [He places them] on all sides so as to face each other: he thereby makes the regions on all sides face each other, and hence the regions on all sides face each other. He lays (the bricks) down separately, settles them separately, and pronounces the sûdadohas over them separately, for separate are the regions.