1 Samuel 18:25

25 Then Saul said, "Thus shall you say to David, "The king desires no marriage present except a hundred foreskins of the Philistines, that he may be avenged on the king's enemies.' " Now Saul planned to make David fall by the hand of the Philistines.

1 Samuel 18:25 In-Context

23 So Saul's servants reported these words to David in private. And David said, "Does it seem to you a little thing to become the king's son-in-law, seeing that I am a poor man and of no repute?"
24 The servants of Saul told him, "This is what David said."
25 Then Saul said, "Thus shall you say to David, "The king desires no marriage present except a hundred foreskins of the Philistines, that he may be avenged on the king's enemies.' " Now Saul planned to make David fall by the hand of the Philistines.
26 When his servants told David these words, David was well pleased to be the king's son-in-law. Before the time had expired,
27 David rose and went, along with his men, and killed one hundred of the Philistines; and David brought their foreskins, which were given in full number to the king, that he might become the king's son-in-law. Saul gave him his daughter Michal as a wife.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.