In up to date Theravada practice, mantra observe is often combined with breathing meditation, so that one particular recites a mantra at the same time with in-breath and out-breath to help you develop tranquility and concentration. His mantra is "Ǎn hōng zhā lì sà mó luō - 唵吽吒唎薩嚩囉". Taoist think https://www.youtube.com/shorts/x-uzzNOcLMQ