Na Nach Nachma Nachman Meuman

Na Nach Nachma Nachman Me'uman (Hebrew: נַ נַחְ נַחְמָ נַחְמָן מֵאוּמַן) is a Hebrew language name and song used by a subgroup of Breslover Hasidim colloquially known as the Na Nachs. It is a kabbalistic formula based on the four Hebrew letters of the name Nachman, referring to the founder of the Breslov movement, Rebbe Nachman of Breslov, along with a reference to his burial place in Uman, Ukraine.

Source: Wikipedia — Na Nach Nachma Nachman Meuman (CC BY-SA 4.0)