पातञ्जलयोगसूत्राणि

Patanjali Yogasutra

The foundational text of the Yoga darshana — one of the six āstika schools of classical Indian philosophy — comprising 196 aphoristic sūtras across four pādas (Samādhi, Sādhana, Vibhūti, Kaivalya). Codifies the eight-limbed path (aṣṭāṅga yoga) culminating in the cessation of mental modifications (citta-vṛtti-nirodhaḥ) and liberation. The traditional dhyāna-śloka credits Patañjali with purifying mind through Yoga, speech through grammar, and body through medicine.