Yoga Sutras of Patanjali · 3.4

त्रयमेकत्र संयमः॥४॥

trayam ekatra saṁyamaḥ

These three — dharana, dhyana, samadhi — when practiced together on a single object are called sanyama.

— Yoga Sutras of Patanjali 3.4

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).