Om Namah Shivaya Is at the center of the Vedas and Tantras (ancient Scriptures) and finds its mention during the Yajurveda inside the Shri Rudram hymn. Perceived to generally be most efficient if, from the practice of Japa Yoga, the place the mantra is recurring verbally or mentally 108 periods https://youtube.com/shorts/CeBSHFfmcrE