Verse 10.5.3.5

sā vākprāṇamasṛjata so'yam prāṇaḥ sṛṣṭa āvirabubhūṣanniruktataro mūrtataraḥ sa ātmānamanvaicatsa tapo'tapyata sa prāmūrcatsa ṣaṭtriṃśataṃ sahasrāṇyapaśyadātmano'gnīnarkānprāṇamayānprāṇacitaste prāṇenaivādhīyanta prāṇenācīyanta prāṇenaiṣu grahā agṛhyanta prāṇenāstuvata prāṇenāśaṃsanyatkiṃ ca yajñe karma kriyate yatkiṃ ca yajñiyaṃ karma prāṇenaiva teṣu tatprāṇamayeṣu prāṇacitsu prāṇamayamakriyata tadyatkiṃ cemāni bhūtāni prāṇena prāṇanti teṣāmeva sā kṛtistānevādadhati tāṃṣcinvanti teṣu grahāngṛhṇanti teṣu stuvate teṣu śaṃsantyetāvatī vai prāṇasya vibhūtiretāvatī visṛṣṭiretāvānprāṇaḥ ṣaṭtriṃśa

Preview of English translation:

5. That Speech created the Breath. This Breath, when created, wished to become manifest,—more defined, more substantial: it sought after a self. It practised austerity: it acquired consistency. It beheld thirty-six thousand Arka-fires of its own self, composed of breath, built up of breath: with breath they were established, and with breath built up; with breath the cups were drawn thereat; with breath they chanted and with breath they recited on them,—whatever rite is performed at the sacrifice, whatever sacrificial rite there is, that was performed by breath alone, as a breathing-performance, on those (fires) composed of breath, and built up of breath. And whatever beings here breathe with breath that was done regarding those (fires):—they establish them, and build them up; they draw the cups for them; they chant on them and recite hymns on them,—of that extent was the development of Breath, of that extent was its creation,—so great is Breath: thirty-six thousand Arka-fires; and each of these as great as that former (fire-altar) was.

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