You can do this Shabar mantra chanting for 11, 21, 31, or forty one days, the location and time of mantra chanting needs to be a similar for the number of times you want to do sadhana. You should use Rudraksha or Tulsi rosary to chant the mantra. It https://your-directory.com/listings13203063/a-simple-key-for-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-unveiled