Judaism is both a religion and an ethnic group. It originated as the religion of the ancient Hebrew people over 4000 years ago. The core beliefs of Judaism are monotheism, the sanctity of the Torah, and a covenant relationship between God and the Jewish people. Some key practices include observing Shabbat and Jewish holidays, following kosher dietary laws, circumcision for males, and studying sacred Jewish texts. Judaism has had a profound influence on both Christianity and Islam through its emphasis on monotheism and ethical teachings.