Triśikhibrāhmaṇa Upaniṣad 101

Triśikhibrāhmaṇopaniṣad 101

ekāhamātraṃ kurvāṇaḥ sarvapāpaiḥ pramucyate |
saṃvatsaratrayādūrdhvaṃ prāṇāyāmaparo naraḥ ||