tasmin svasti samāsīna
Sitting in an easy posture is called svasti samāsīnaḥ. It is recommended in the yoga scripture that one should put the soles of the feet between the two thighs and ankles and sit straight; that posture will help one to concentrate his mind on the Supreme Personality of Godhead. This very process is also recommended in Bhagavad-gītā, Sixth Chapter. It is further suggested that one sit in a secluded, sanctified spot. The seat should consist of deerskin and kuśa grass, topped with cotton.