You are able to do this Shabar mantra chanting for 11, 21, 31, or 41 times, the place and time of mantra chanting needs to be the same for the volume of days you ought to do sadhana. You should use Rudraksha or Tulsi rosary to chant the mantra. https://trentonsciou.blogofchange.com/32915612/a-simple-key-for-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-unveiled