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.
Kipsigis people
Kipsigis men undergo circumcision at about 14 years of age. Afterwards, the boy lives in a "menjo" near a forest or away from the main community while they heal. During this period, Kipsigis males undergo three traditional ceremonies called the "kelab-eun", the "tyenjinet" and the "kayaet". After the first ritual, the boys are allowed to venture out into the forest for hunting using bows and wood-made-arrows. It is at this point in time that they master the use of the weapons of traditional warfare.