Om Namah Shivaya Is at the guts in the Vedas and Tantras (historic Scriptures) and finds its mention during the Yajurveda inside the Shri Rudram hymn. Perceived to generally be most productive if, while in the apply of Japa Yoga, where the mantra is recurring verbally or mentally 108 periods https://youtube.com/shorts/CeBSHFfmcrE