tasmin sati śvāsapraśvāsayor gativicchedaḥ prāṇāyāmaḥ [YS 2.49]

saty āsanajaye bāhyasya vāyor ācamanaṃ śvāsaḥ, kauṣṭhyasya vāyor niḥsāraṇaṃ praśvāsaḥ, tayor gativiccheda ubhayābhāvaḥ prāṇāyāmaḥ.

sa tu ---