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.
Circumcision in Africa
In some South African ethnic groups, circumcision has roots in several belief systems, and is performed most of the time on teenage boys:
The young men in the eastern Cape belong to the Xhosa ethnic group for whom circumcision is considered part of the passage into manhood. ... A law was recently introduced requiring initiation schools to be licensed and only allowing circumcisions to be performed on youths aged 18 and older. But Eastern Cape provincial Health Department spokesman Sizwe Kupelo told Reuters news agency that boys as young as 11 had died. Each year thousands of young men go into the bush alone, without water, to attend initiation schools. Many do not survive the ordeal.
According to one article, as of December 2015, 10 million men have undergone voluntary circumcision in East and Southern Africa. since 2008.