1 Samuel 18:25-27
Context18:25 Saul replied, “Here is what you should say to David: ‘There is nothing that the king wants as a price for the bride except a hundred Philistine foreskins, so that he can be avenged of his 1 enemies.’” (Now Saul was thinking that he could kill David by the hand of the Philistines.)
18:26 So his servants told David these things and David agreed 2 to become the king’s son-in-law. Now the specified time had not yet expired 3 18:27 when David, along with his men, went out 4 and struck down two hundred Philistine men. David brought their foreskins and presented all of them to the king so he could become the king’s son-in-law. Saul then gave him his daughter Michal in marriage.