וּלְשָׁא֣וּל פִּלֶ֔גֶשׁ וּשְׁמָ֖הּ רִצְפָּ֣ה בַת־אַיָּ֑ה וַיֹּ֙אמֶר֙ אֶל־אַבְנֵ֔ר מַדּ֥וּעַ בָּ֖אתָה אֶל־פִּילֶ֥גֶשׁ אָבִֽי׃
Now Saul had a concubine, whose name was Rizpah, the daughter of Aiah; and [Ish-bosheth] said to Abner: ‘Wherefore hast thou gone in unto my father’s concubine?’
Read Kabbalistic (mystical) interpretations of II Samuel 3:7: Zohar and classical Jewish mystical sources, free online.