1 Samuel 18:20-30 - David's Marriage To Michal
20 Michal, Saul's daughter, loved David; and they told Saul, and the thing pleased him. 21 Saul said, I will give her to him, that she may be a snare to him, and that the hand of the Philistines may be against him. Therefore Saul said to David, "You shall this day be my son-in-law a second time."
22 Saul commanded his servants, "Talk with David secretly, and say, 'Behold, the king has delight in you, and all his servants love you: now therefore be the king's son-in-law.'" 23 Saul's servants spoke those words in the ears of David. David said, "Does it seems to you a light thing to be the king's son-in-law, since I am a poor man, and lightly esteemed?"
24 The servants of Saul told him, saying, "David spoke like this."
25 Saul said, "You shall tell David, 'The king desires no dowry except one hundred foreskins of the Philistines, to be avenged of the king's enemies.'" Now Saul thought to make David fall by the hand of the Philistines.
26 When his servants told David these words, it pleased David well to be the king's son-in-law. The days were not expired; 27 and David arose and went, he and his men, and killed of the Philistines one hundred men; and David brought their foreskins, and they gave them in full number to the king, that he might be the king's son-in-law. Saul gave him Michal his daughter as wife. 28 Saul saw and knew that the LORD was with David; and Michal, Saul's daughter, loved him. 29 Saul was yet the more afraid of David; and Saul was David's enemy continually.
30 Then the leaders of the Philistines went forth: and it happened, as often as they went forth, that David behaved himself more wisely than all the servants of Saul; so that his name was highly esteemed.