The Old Testament is awfully big on foreskins (e.g. Genesis 34 and 1 Samuel 18:27). In particular, the Israelites are fond of collecting the foreskins of their enemies, usually after they have been slain, but occasionally beforehand.
It's such a bizarre-seeming detail that it got me wondering. Are there any non-Biblical historical references to this practice? Does it have any overlap with the historical origins of circumcision (it would seem it must, but I can't quite imagine what the backstory would be)?
Any insights would be much appreciated.