1 Samuel 18:17

Now the sons of Saul were Jonathan and Ishvi and Malchi-shua; and the names of his two daughters were these: the name of the firstborn Merab and the name of the younger Michal.

And Saul said, “I will give her to him that she may become a snare to him, and that the hand of the Philistines may be against him.” Therefore Saul said to David, “For a second time you may be my son-in-law today.”

Saul then said, “Thus you shall say to David, ‘The king does not desire any dowry except one hundred foreskins of the Philistines, to take vengeance on the king’s enemies.’” Now Saul planned to make David fall by the hand of the Philistines.

David rose up and went, he and his men, and struck down two hundred men among the Philistines. Then David brought their foreskins, and they gave them in full number to the king, that he might become the king’s son-in-law. So Saul gave him Michal his daughter as a wife.

“Please forgive the transgression of your maidservant; for Yahweh will certainly make for my lord an enduring house because my lord is fighting the battles of Yahweh, and evil will not be found in you all your days.

Then David came to Ziklag and sent some of the spoil to the elders of Judah, to his friends, saying, “Behold, a gift for you from the spoil of the enemies of Yahweh: