Foreskin

The foreskin is a fleshy sheath around the glans of the penis. It can be removed by circumcision.

Foreskins in the Bible

 * : Zipporah circumcises her son and presents the foreskin to Moses.
 * : David kills 200 Philistines and presents their foreskins to Saul, in order to marry Saul's daughter. also references this story.