For whatsoever man he be that hath a blemish, he shall not approach: a blind man, or a lame, or he that hath a flat nose, or any thing superfluous. Leviticus 21:18
Some wicked Jews in Judea during the Seleucid occupation who were trying to make themselves look more Greek and less Jewish.
In those days there went out of Israel wicked men, and they persuaded many, saying: Let us go, and make a covenant with the heathens ... And they made themselves prepuces. Genesis 1:12