You can do this Shabar mantra chanting for 11, 21, 31, or forty one times, the location and time of mantra chanting really should be the same for the amount of times you ought to do sadhana. You can utilize Rudraksha or Tulsi rosary to chant the mantra. It https://directory-legit.com/listings13057849/the-definitive-guide-to-most-powerful-sarv-karya-sidh-shabar-mantra-karya-siddhi-shabar-mantra-most-powerful-shabar-mantra