Yoga Sutras of Patanjali · 3.34

हृदये चित्तसंवित्॥३४॥

hṛdaye citta-saṁvit

By sanyama on the heart, knowledge of the mind arises.

— Yoga Sutras of Patanjali 3.34

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).