TantraS, 4, 12.0 na ca atra sattarkāt śuddhavidyāprakāśarūpāt ṛte anyat yogāṅgaṃ sākṣāt upāyaḥ tapaḥprabhṛteḥ niyamavargasya ahiṃsādeś ca yamaprakārasya pūrakādeḥ prāṇāyāmavargasya vedyamātraniṣṭhatvena ka iva saṃvidi vyāpāraḥ //