Śrīmad-Bhāgavatam 3.28.9
SB 3.28.9
Open the full passageSanskrit
prāṇasya śodhayen mārgaṁ pūra-kumbhaka-recakaiḥ pratikūlena vā cittaṁ yathā sthiram acañcalam
Translation
The yogī should clear the passage of vital air by breathing in the following manner: first he should inhale very deeply, then hold the breath in, and finally exhale. Or, reversing the process, the yogi can first exhale, then hold the breath outside, and finally inhale. This is done so that the mind may become steady and free from external disturbances.