Yoga Rahasya Chapter One verse 45

āsanena vinā prāṇāyāmaḥ sidhyati na eva hi |
vinā prāṇa nirodhena na manaḥ sthiratāṃ vrajet ||

Without Āsana, truly, Prāṇāyāma cannot become accomplished.
Without containing Prāṇa, the mind cannot achieve steadiness.

āsana - particular posture; sitting, sitting down; seat, place, stool; abiding, dwellingvinā - withoutprāṇāyāma - extending the breathsiddhi - accomplishment, performance, fulfilment, attainment, success; the hitting of a mark; coming into force, validity; any unusual skill or faculty or capability; the acquisition of supernatural powers by magical means or the faculty so acquiredeva - indeed, truly, really; thus; so, just so, exactly soprāṇa - the breath of life, breath, respiration, spirit, vitality; vital air; air inhaled, wind; vigour, energy, powernirodha - to contain, enclose; cover; confine, restrain; quell, surpress; quiescemanas - mind; that which objects of sense affect; the faculty or instrument through which thoughts entersthira - steady, firm, not wavering or tottering; fixed, immovable, motionless, still, calmvrajet - can achieve

Commentaries and Reflections

Commentary by Paul Harvey:

“Without Āsana,
Prāṇāyāma cannot become accomplished.
Without containing Prāna,
the mind cannot achieve steadiness.”