וַיֹּ֨אמֶר שָׁא֜וּל כֹּֽה־תֹאמְר֣וּ לְדָוִ֗ד אֵֽין־חֵ֤פֶץ לַמֶּ֙לֶךְ֙ בְּמֹ֔הַר כִּ֗י בְּמֵאָה֙ עָרְל֣וֹת פְּלִשְׁתִּ֔ים לְהִנָּקֵ֖ם בְּאֹיְבֵ֣י הַמֶּ֑לֶךְ וְשָׁא֣וּל חָשַׁ֔ב לְהַפִּ֥יל אֶת־דָּוִ֖ד בְּיַד־פְּלִשְׁתִּֽים׃
And Saul said: ‘Thus shall ye say to David: The king desireth not any dowry, but a hundred foreskins of the Philistines, to be avenged of the king’s enemies.’ For Saul thought to make David fall by the hand of the Philistines.
Read midrashic interpretation of I Samuel 18:25: and classical rabbinic exegesis.