The Goraksha Shataka (13th – 14th C. AD) proclaims that there are 8.4 million postures in Hatha Yoga, as many as there are species of living beings on this planet. According to Goraksha, the author, 84 of these postures have been selected by Lord Shiva as the main ones. Two of these, Siddha Asana and Padma Asana, which are later on included in the Hatha Yoga tradition as well, he considers to be of the highest importance for meditation.