Yoga Sūtra Chapter Two verse 53

धारणासु च योग्यता मनसः ॥५३॥

dhāraṇāsu ca yogyatā manasaḥ ||53||

And fitness of the mind for concentration.

dhāraṇā - retaining, keeping back; fixation; collection or concentration of the mind; to exercise concentration; the act of holding, bearing, wearing, supporting, maintaining;ca - andyogyatā - fitness, ability, capability, suitableness, proprietymanas - mind; that which objects of sense affect; the faculty or instrument through which thoughts enter

Commentaries and Reflections

Commentary by Paul Harvey:

“As Prāṇāyāma dissolves the covering of the light,
fitness of the mind for concentration arises.”

Prāṇāyāma is a key to the door of Dhāraṇā.”