Yoga Sutras of Patanjali · 1.32

तत्प्रतिषेधार्थमेकतत्त्वाभ्यासः ॥३२॥

tatpratiṣedhārthamekatattvābhyāsaḥ

To prevent these obstacles, practice on a single principle.

— Yoga Sutras of Patanjali 1.32

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).