Yoga Sutras of Patanjali · 2.53
धारणासु च योग्यता मनसः ॥५३॥
dhāraṇāsu ca yogyatā manasaḥ
And the mind becomes fit for concentration.
— Yoga Sutras of Patanjali 2.53
Source: Sanskrit attributed to Patanjali (c. 2nd century BCE – 4th century CE). Public-domain English readings drawn from Swami Vivekananda's 'Raja Yoga' (1896) and Charles Johnston's 'The Yoga Sutras of Patanjali' (1912).