Om Namah Shivaya Is at the guts of the Vedas and Tantras (ancient Scriptures) and finds its mention while in the Yajurveda from the Shri Rudram hymn. Perceived to get most productive if, during the practice of Japa Yoga, exactly where the mantra is repeated verbally or mentally 108 instances https://youtube.com/shorts/CeBSHFfmcrE