Mordechai Werdyger (born April 16, 1951) is an American Hasidic Jewish singer and songwriter popular in the Orthodox Jewish community. As the son of famous Cantor David Werdyger he is known by his stage name Mordechai Ben David (Hebrew: מרדכי בן דוד‎, romanized: Mordocháy Ben-Davíd, lit. 'Mordechai, son of David') or its initials, MBD. He is known as the "King of Jewish Music" and has released over 30 albums while performing worldwide. He has headlined the popular HASC and Ohel charity concerts for almost two decades.