You are able to do this Shabar mantra chanting for 11, 21, 31, or forty one days, the spot and time of mantra chanting must be a similar for the volume of times you want to do sadhana. You can utilize Rudraksha or Tulsi rosary to chant the mantra. https://vashikaran98653.thezenweb.com/the-5-second-trick-for-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-70369209