You are able to do this Shabar mantra chanting for 11, 21, 31, or 41 days, the put and time of mantra chanting need to be the exact same for the volume of times you should do sadhana. You can use Rudraksha or Tulsi rosary to chant the mantra. https://vashikaran96565.blog2freedom.com/32360073/new-step-by-step-map-for-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra