The Darshana or Jabala Darshana Upanishad be,
Teaches secrets of yoga to his disciple Sankriti;
While explaining the Asthanga Yoga profoundly,
With reference to the Vedic tradition specifically;
Darshana Upanishad 90th of 108 Upanshads be,
In the Muktika Upanishad order very categorically.