Yoga Sutras of Patanjali · 2.2

समाधिभावनार्थः क्लेशतनूकरणार्थश्च ॥२॥

samādhi-bhāvanārthaḥ kleśa-tanūkaraṇārthaśca

Kriya Yoga is undertaken for the cultivation of samadhi and for the attenuation of the kleshas.

— Yoga Sutras of Patanjali 2.2

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).