Verse 10.5.4.4

ādityo ha tvevaiṣo'gniścitaḥ tasya diśa eva pariśritastāḥ ṣaṣṭiśca trīṇi ca śatāni bhavanti ṣaṣṭiśca ha vai trīṇi ca śatānyādityaṃ diśaḥ samantam pariyanti raśmayo yajuṣmatya iṣṭakāstāḥ ṣaṣṭiścaiva trīṇi ca śatāni bhavanti ṣaṣṭiśca ha vai trīṇi ca śatānyādityasya raśmayastadyatpariśritsu yajuṣmatīḥ pratyarpayati raśmīṃstaddikṣu pratyarpayatyatha yadantarā diśaśca raśmīṃśca tatsūdadohā atha yaddikṣu ca raśmiṣu cānnaṃ tatpurīṣaṃ tā āhutayastāḥ samidho'tha yaddiśa iti ca raśmaya iti cākhyāyate tallokampṛṇā tadvā etatsarvaṃ diśa iti caiva raśmaya iti cākhyāyate tatsarvo'gnirlo

Preview of English translation:

4. But, indeed, that Fire-altar also is the sun:—the regions are its enclosing-stones, and there are three hundred and sixty of these, because three hundred and sixty regions encircle the sun on all sides;—the rays are its Yajushmati bricks, for there are three hundred and sixty of these, and three hundred and sixty rays of the sun; and in that he establishes the Yajushmatis within the enclosing-stones thereby he establishes the rays in the regions. And what is between the regions and the rays, is its Sudadohas; and what food there is in the regions and rays that is the earth-fillings, the oblations and the fire-logs; and that which is called both 'regions' and 'rays' is the space-filling (brick):—thus this comes to make up the whole Agni; and the whole Agni comes to be the space-filler; and, verily, whosoever knows this, thus comes to be that whole (Agni) who is the space-filler.

For a detailled translation, including proper diacritics and footnotes, go the full English translation.