Yoga Sutras of Patanjali · 2.24

तस्य हेतुरविद्या ॥२४॥

tasya hetur avidyā

The cause of the conjunction is ignorance.

— Yoga Sutras of Patanjali 2.24

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).