This can be the shiva beej mantra. Here the “HA” stands for shiv and “UM” stands for Sadashiv. To evoke the blessings of Lord Shiva, chant this mantra retaining lord shiva in your mind and focusing on him only. भुक्तिमुक्तिदायकं प्रशस्तचारु विग्रहं महिलाओं पर जल्दी अटैक करती हैं ये https://www.youtube.com/watch?v=0vLISs2kzMI