For example in Mongolian Shamanism, the name of the most sacred mountain, the rumored birthplace and final resting spot of Genghis Khan, is also Burkhan Khaldun.
While on the run these men swore allegiance to one another and remarkably these men included Buddhists, Christians, Muslims, and animists who worshiped the Eternal Blue Sky and the God Mountain of Burkhan Khaldun.
At the time Butunchar Munkhag was born (around 900CE) the Mongol tribes were located around Mount Burkhan Khaldun at the source of the Onon River.