1 Samuel 18:20-30 - David's Marriage To Michal
20 Now Michal, Saul’s daughter, loved David; and when they told Saul, it pleased him. 21 Saul said, “I will give her to him so that she may become a snare (bad influence, source of trouble) to him, and that the hand of the Philistines may be against him.” So Saul said to David for a second time, “You shall be my son-in-law today.”
22 Then Saul commanded his servants, “Speak to David secretly, saying, ‘Listen, the king delights in you, and all his servants love you; now then, become the king’s son-in-law.’” 23 So 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?”
24 The servants of Saul told him what David said.
25 Then 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
26 When his servants told David these words, it pleased him to become the king’s son-in-law. Before the time [for the marriage] arrived, 27 David arose and went, he and his men, and killed two hundred Philistine men, and David brought their foreskins [as proof of death] and presented
30 Then the Philistine commanders (princes) came out to battle, and it happened as often as they did, that David acted more wisely and had more success than all Saul’s servants. So his name was highly esteemed.