You are able to do this Shabar mantra chanting for 11, 21, 31, or 41 times, the place and time of mantra chanting must be the exact same for the volume of times you ought to do sadhana. You may use Rudraksha or Tulsi rosary to chant the mantra. https://coolbizdirectory.com/listings13053325/what-does-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra-mean