Israel ben Eliezer or Yisroel ben Eliezer, known as the Baal Shem Tov or as the BeShT, was a Jewish mystic and healer who is regarded as the founder of Hasidic Judaism. "Besht" is the acronym for Baal Shem Tov, which means "Master of the Good Name," a term for a holy man who wields the secret name of God.

Hasidism, sometimes spelled Chassidism, and also known as Hasidic Judaism, is a religious movement within Judaism that arose as a spiritual revival movement in Poland and contemporary Western Ukraine, during the 18th century, and spread rapidly throughout Eastern Europe. Today, most of those affiliated with the movement, known as hassidim, reside in Israel and in the United States.