Shabar mantra sadhana or almost every other sadhana should be completed, the 1st condition is that the seeker must have unshakable religion and devotion towards the mantra and sadhana, When you've got even the slightest doubt about your sadhana and mantra, Then you can certainly normally You cannot be prosperous, https://www.youtube.com/watch?v=qGCHTa9HGyw