Sage Pantanjali wrote the Yoga Sutras, which is a collection of sutras that describe the philosophy of yoga and its applied practice. Little is known about Pantanjali, but it is believed that the text (made up of 195 sutras contained in four chapters) was written more than 1,700 years ago as a compiled guide and explanation of the practice and philosophy of yoga.
Sutras are known for being brief and easy to memorize. Practitioners of yoga find it useful to meditate on or chant the Sanskrit sutras during their practice. Many also use the scriptures as an instruction on how to live.