An hundred foreskins - This is merely another expression of the spirit which led to the constant application of the epithet uncircumcised to the Philistines 1 Samuel 14:6.
Related Commentaries of 1 Samuel 18:25
1 Samuel 18:25
25 And Saul said, Thus shall ye say to David, The king desireth not any dowry, but an hundred foreskins of the Philistines, to be avenged of the king's enemies. But Saul thought to make David fall by the hand of the Philistines.