Yoga Sutras of Patanjali · 4.34

पुरुषार्थशून्यानां गुणानां प्रतिप्रसवः कैवल्यं स्वरूपप्रतिष्ठा वा चितिशक्तिरिति॥३४॥

puruṣārthaśūnyānāṁ guṇānāṁ pratiprasavaḥ kaivalyaṁ svarūpapratiṣṭhā vā citiśaktir iti

When the gunas — now empty of any purpose for the purusha — return to their own source, this is kaivalya: the establishment of the power of pure consciousness in its own nature. Thus the Yoga Sutras conclude.

— Yoga Sutras of Patanjali 4.34

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).