Shatapatha Brahmana 10.5.4.12

10.5.4.12

ātmā ha tvevaiṣo'gniścitaḥ tasyāsthīnyeva pariśritastāḥ ṣaṣṭiśca trīṇi ca śatāni bhavanti ṣaṣṭiśca ha vai trīṇi ca śatāni puruṣasyāsthīni majjāno yajuṣmatya iṣṭakāstāḥ ṣaṣṭiścaiva trīṇi ca śatāni bhavanti ṣaṣṭiśca ha vai trīṇi ca śatāni puruṣasya majjāno'tha yā amūḥ ṣaṭtriṃśadiṣṭakā atiyanti yaḥ sa trayodaśo māsa ātmā prāṇaḥ sa tasya triṃśadātmanvidhāḥ pratiṣṭhāyāṃ dve śīrṣandve tadyatte dve bhavato dvikapālaṃ hi śiro'tha yenemāni parvāṇi saṃtatāni tatsūdadohā athaitattrayaṃ yenāyamātmā pracanno loma tvaṅmāṃsamiti tatpurīṣaṃ yatpibati tā āhutayo yadaśnāti tāḥ samidho'tha yadātmetyākhyāyate tallokampṛṇā tadvā etatsarvamātmetyevākhyāyate tatsarvo'gnirlo

But, indeed, that Fire-altar also-is the body,--the bones are its enclosing-stones, and there are three hundred and sixty of these, because there are three hundred and sixty bones in man; the marrow parts are the Yagushmatî bricks, for there are three hundred and sixty of these, and three hundred and sixty parts of marrow in man; and those thirty-six bricks which are over, are the thirteenth month, the trunk, the vital air (of the altar),--in his body there are thirty parts, in his feet two, in his vital airs two, and in his head two,--as to there being two of these, it is because the head consists of two skull-bones. And that whereby these joints are held together is the Sûdadohas; and those three whereby this body is covered--to wit, hair, skin, and flesh--are the earth-fillings; what he drinks is the oblations, and what he eats the fire-logs; and what is called the 'body,' that 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.