Aitareya Āraṇyaka 3.2.1

3.2.1

prāṇo vaṃśa iti sthaviraḥ śākalyaḥ \
tad yathā śālāvaṃśe sarve 'nye vaṃśāḥ samāhitāḥ syur, evam asmin prāṇe cakṣuḥ śrotraṃ mano vāg indriyāṇi śarīraṃ sarva ātmā samāhitaḥ \
tasyaitasyātmanaḥ prāṇa ūṣmarūpam, asthīni sparśarūpaṃ, majjānaḥ svararūpaṃ, māṃsaṃ lohitam ity etad anyac caturtham antasthārūpam iti ha smāha hrasvo mā/ṇḍūkeyaḥ \
trayaṃ tv eva na etat proktam \
tasyaitasya trayasyāsthnāṃ majjñāṃ parvaṇām iti trīṇītaḥ ṣaṣṭiśatāni, trīṇītas.
tāni sapta viṃśatiśatāni bhavanti.
sapta ca vai śatāni viṃśatiś ca saṃvatsa/rasyāhorātrāḥ \
sa eṣo 'haḥsaṃmānaś cakṣurmayaḥ śrotramayaś chandomayo manomayo vāṅmaya ātmā \
sa ya evam etam ahaḥsaṃmānaṃ cakṣurmayaṃ śrotramayaṃ chandomayaṃ manomayaṃ vāṅmayam ātmānaṃ vedāhnāṃ sāyujyaṃ sarūpatāṃ salokatām aśnute.
putrī paśumān bhavati.
sarvam āyur eti \\ 1 \\

Of that self the breathing is like the sibilants, the bones like the mutes, the marrow like the vowels, and the fourth part, flesh, blood, and the rest, like the semivowels,--so said Hrasva Mândûkeya.

To us it was said to be a triad only.

Of that triad, viz. bones, marrow, and joints, there are 360 (parts) on this side (the right), and 360 on that side (the left). They make 720 together, and 720 are the days and nights of the year. Thus that self which consists of sight, hearing, metre, mind, and speech is like unto the days.

He who thus knows this self, which consists of sight, hearing, metre, mind, and speech, as like unto the days, obtains union, likeness, or nearness with the days, has sons and cattle, and lives his full age.