YSBhā zu YS, 2, 50.1, 7.1 saṃkhyābhiḥ paridṛṣṭā etāvadbhiḥ śvāsapraśvāsaiḥ prathama udghātas tadvan nigṛhītasyaitāvadbhir dvitīya udghāta evaṃ tṛtīyaḥ evaṃ mṛdur evaṃ madhya evaṃ tīvra iti saṃkhyāparidṛṣṭaḥ //