וַתֶּאֱהַ֛ב מִיכַ֥ל בַּת־שָׁא֖וּל אֶת־דָּוִ֑ד וַיַּגִּ֣דוּ לְשָׁא֔וּל וַיִּשַׁ֥ר הַדָּבָ֖ר בְּעֵינָֽיו׃
And Michal Saul’s daughter loved David; and they told Saul, and the thing pleased him.
Read halakhic rulings (Jewish law) on I Samuel 18:20 from the Mishneh Torah and classical halakhic sources, free online.