Sir Alec - “... but this has already been asked by another ABer... The practice originated because sand used to get under the foreskin and cause pain...”
Sorry everyone – I was unaware that this question had already been posted elsewhere.
Beso was largely correct in his statement about it being a covenant between God and the Hebrews. Specifically, it is in the first book of Samuel; basically King Saul tried to give David (ie. the David of the David and Goliath story) an impossible task – if David were to marry one of Saul's daughters, he must bring him 100 foreskins of the Philistines. David apparently excelled himself and brought back 200 foreskins in a desperate attempt to impress Saul (1 Samuel 18:27).
It is this story of Saul and David that is used to justify the present day practice of circumcision. I must say that I find the theory that circumcision as a tradition has arisen due to the 'sand under the foreskin' idea as being laughable.
Wikipediia has this to say about it, “... The origination of male circumcision is not known with certainty. It has been variously proposed that it began as a religious sacrifice, as a rite of passage marking a boy's entrance into adulthood, as a form of sympathetic magic to ensure virility or fertility, as a means of enhancing sexual pleasure...”
http://en.wikipedia.o..._of_male_circumcision