Circumcision
Circumcision is very important to most branches of Judaism, with over 90% of male adherents having the procedure performed as a religious obligation. The basis for its observance is found in the Torah of the Hebrew Bible, in Genesis chapter 17, in which a covenant of circumcision is made with Abraham and his descendants. Jewish circumcision is part of the "brit milah" ritual, to be performed by a specialist ritual circumciser, a "mohel", on the eighth day of a newborn son's life, with certain exceptions for poor health. Jewish law requires that the circumcision leaves the glans bare when the penis is flaccid. Converts to Conservative and Orthodox Judaism must also be circumcised; those who are already circumcised undergo a symbolic circumcision ritual. Circumcision is not required by Judaism for one to be considered Jewish, but some adherents foresee serious negative spiritual consequences if it is neglected.
Religious male circumcision
Circumcision in ancient Egypt was thought to be a mark of passage from childhood to adulthood. The alteration of the body and ritual of circumcision was supposed to give access to ancient mysteries reserved solely for the initiated. The content of those mysteries are unclear but are likely to be myths, prayers, and incantations central to Egyptian religion. The Egyptian Book of the Dead, for example, tells of the sun god Ra performing a self-circumcision, whose blood created two minor guardian deities. Circumcisions were performed by priests in a public ceremony, using a stone blade. It is thought to have been more popular among the upper echelons of the society, although it was not universal and those lower down the social order are known to have had the procedure done.