Shatapatha Brahmana 8.4.4.8

8.4.4.8

atha yā madhya upadadhāti | sa ātmā tā retaḥsicorvelayopadadhāti pṛṣṭayo vai retaḥsicau madhyamu pṛṣṭayo madhyato hyayamātmā sarvata upadadhāti sarvato hyayamātmātha yadato 'nyadatiriktaṃ tadyadvai devānāmatiriktaṃ candāṃsi tāni tadyāni tāni candāṃsi paśavaste tadye te paśavaḥ puṇyāstā lakṣmyastadyāstāḥ puṇyā lakṣmyo 'sau sa ādityaḥ sa āsāmeṣa dakṣiṇataḥ

And those he places in the middle are the body (trunk). He places them on the range of the Retahsik (bricks), for--the Retahsik being the ribs, and the ribs being the middle (of the body)--this body is in the middle (of the limbs). He places them in every direction, for this body (extends) in every direction. And as to what other (space) there is besides this, that is left over;--and what is left over for the gods, that is these metres;--and as to these metres, they are cattle;--and as to cattle, they are (objects of) good fortune;--and as to these (objects of) good fortune, they are yonder sun: he is that one to the south of them.