You can do this Shabar mantra chanting for eleven, 21, 31, or forty one days, the put and time of mantra chanting need to be the exact same for the volume of days you want to do sadhana. You should utilize Rudraksha or Tulsi rosary to chant the mantra. https://ericklbqes.tusblogos.com/32460873/most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-an-overview