The mitzvah of sanctifying the Kohen with distinct roles and obligations derived from heredity is morally incompatible with the principle of egalitarianism. The mitzvah of sanctifying the Kohen The commandment to sanctify the progeny of Ahron (Hebrew "מצוות קידוש זרעו של אהרן") is a commandment based in the Hebrew Bible, and developed in rabbinical teaching that requires believers in Judaism to sanctify their priests ("kohanim") in various ways. These include assisting him to abstain from any prohibitions in the Law that apply to him, and by affording him first rights in areas relating to holiness and the service of God. In the enumeration of Maimonides this
Bar and Bat Mitzvah the family and the community. Bar mitzvah is mentioned in the Mishnah (Ethics of the Fathers, ) and in the Talmud. In some classic sources the age of 13 appears for instance as the age from which males must fast on the Day of Atonement, while females fast from the age of 12. The age of b'nai mitzvah roughly coincides with physical puberty. The bar or bat mitzvah ceremony is usually held on the first Shabbat after a boy's thirteenth and a girl's twelfth birthday (or thirteenth in Reform congregations). "Bar" () is a Jewish Babylonian Aramaic word literally meaning