1 Samuel 18:22-25

22Then Saul commanded his courtiers, “Speak with David privately and say, ‘Behold, the king delights in you and all his courtiers love you. So now, become the king’s son-in-law!’”

23So Saul’s courtiers whispered these words in David’s ears. But David said, “Is it a light thing to you becoming the king’s son-in-law, considering that I am a poor man and of little account?”

24Saul’s courtiers reported back to him what David had said.

25Then Saul said, “Thus you will say to David, ‘The king desires no bridal dowry except 100 foreskins of the Philistines—to take vengeance on the king’s enemies.’” So Saul schemed to make David fall by the hand of the Philistines.