Bhagavad Gita, Chapter 4, Verse 29

अपाने जुह्वति प्राणं प्राणेऽपानं तथापरे । प्राणापानगती रुद्ध्वा प्राणायामपरायणाः

apāne juhvati prāṇaṃ prāṇe'pānaṃ tathāpare | prāṇāpānagatī ruddhvā prāṇāyāmaparāyaṇāḥ

Translation

Others offer prāṇa (outgoing breath) in apāna (incoming breath), and apāna in prāṇa, restraining the passages of prāṇa and apāna, absorbed in prāṇāyāma (restraint of breath).

— Alladi Mahadeva Sastri

Word meanings

apāne

in incoming breath

juhvati

sacrifice

prāṇam

outgoing breath

prāṇe

in outgoing breath

apānam

incoming breath

tathā

thus

apare

others

prāṇāpānagatī

of prāṇa, and, of apāna, (the two) courses

ruddhvā

having restrained

prāṇāyāmaparāyaṇāḥ

prāṇāyāma, final refuge, whose, they

Śaṅkarācārya's commentary

Some practise the kind of prāṇāyāma called Pūraka (filling in); some practise the kind called Recaka (emptying); some are engaged in the practice called Kumbhaka by impeding the outward passage of the air through nostrils and the mouth, and by impeding the inward passage in the opposite direction.