You are able to do this Shabar mantra chanting for 11, 21, 31, or 41 days, the position and time of mantra chanting need to be the identical for the volume of days you wish to do sadhana. You should use Rudraksha or Tulsi rosary to chant the mantra. https://beckettqclrx.blogpixi.com/32652994/most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-no-further-a-mystery