49th Sutra Chapter 2: b
The cosmic energy is churned together through inhalation and exhalation for the production of the nectar of life.
This is called Pranayama.
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तस्मिन् सति श्वासप्रश्वासयोर्गतिविच्छेदः प्राणायामः
tasmin: on this
sati: being accomplished
shvaasa: inhalation
prashvaasayoh: exhalation
gati: movement
vichChedaH: regulation;
prana: cosmic energy
ayama: churning
praaNaayaamaH: regulation of breath
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