1 Samuel 18:23-25

23So Saul’s servants spoke these words to David. But David said, “Is it a trivial thing in your sight to become a king’s son-in-law, seeing that I am a poor man and insignificant?”

24The servants of Saul told him what David said.

25Then Saul said, “This is what you shall say to David: ‘The king wants no dowry except a hundred foreskins of the Philistines, to take vengeance on the king’s enemies.’ ” Now Saul’s intention was to cause David’s death at the hand of the Philistines.