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