According to Wikipedia: "The Yoga Sutras of Patañjali are 196 Indian sutras (aphorisms) that constitute the foundational text of Raja Yoga. Yoga is one of the six orthodox astika schools of Hindu philosophy, which, according to the Yogatattva Upanishad, is divided into four forms - Mantrayoga, Layayoga, Hathayoga and Rajayoga - the last of which is the highest (or royal) practice. Although the Yoga Sutras have become the most important text of Yoga, the opinion of most scholars is that Patañjali was not the creator of Yoga, which existed well before him, but merely a great expounder."

According to Wikipedia: "The Yoga Stras of Patañjali are 196 Indian stras (aphorisms) that constitute the foundational text of Rja Yoga. Yoga is one of the six orthodox stika schools of Hindu philosophy, which, according to the Yogatattva Upanishad, is divided into four forms Mantrayoga, Layayoga, Hathayoga and Rjayoga the last of which is the highest (or royal) practice. Although the Yoga Sutras have become the most important text of Yoga, the opinion of most scholars is that Patañjali was not the creator of Yoga, which existed well before him, but merely a great expounder."