Hatha Yoga Pradipika is one of the most authorized ancient texts on
Hatha Yoga. It is believed to have been written in the 14th century by Svatmarama Yogendra and is used both by yoga teachers, and students of yoga. Hatha Yoga Pradipika describes various aspects of yoga like pranayama, shatkarma, mudra, bandha, meditation, laya yoga, nada yoga,
kundalini yoga, and yoga nidra.