1 Samuel 18:22-25

22Then Saul ordered his attendants: “Speak to David privately and say, ‘Look, the king likes you, and his attendants all love you; now become his son-in-law.’ ”

23They repeated these words to David. But David said, “Do you think it is a small matter to become the king’s son-in-law? I’m only a poor man and little known.”

24When Saul’s servants told him what David had said,

25Saul replied, “Say to David, ‘The king wants no other price for the bride than a hundred Philistine foreskins, to take revenge on his enemies.’ ” Saul’s plan was to have David fall by the hands of the Philistines.