You are able to do this Shabar mantra chanting for 11, 21, 31, or forty one days, the spot and time of mantra chanting should be the same for the volume of times you wish to do sadhana. You may use Rudraksha or Tulsi rosary to chant the mantra. https://vashikaran74173.dailyblogzz.com/32898661/most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-secrets