'Foreskins' in the Bible

And Saul saith, 'Thus do ye say to David, There is no delight to the king in dowry, but in a hundred foreskins of the Philistines -- to be avenged on the enemies of the king;' and Saul thought to cause David to fall by the hand of the Philistines.

and David riseth and goeth, he and his men, and smiteth among the Philistines two hundred men, and David bringeth in their foreskins, and they set them before the king, to be son-in-law to the king; and Saul giveth to him Michal his daughter for a wife.