ब्रह्म मुहूर्त में सुबह ४ से ६ बजे के बीच या सूर्यास्त के समय। The earliest mantras had been translated by Expert Gorakhnath who had attained Samadhi or the ultimate union with god. Because of their initial meant objective, these mantras had been meant to operate quick with precision https://www.youtube.com/watch?v=1G1uzSVseNU