וַיֻּגַּ֖ד לְדָוִ֑ד אֵ֧ת אֲשֶׁר־עָשְׂתָ֛ה רִצְפָּ֥ה בַת־אַיָּ֖ה פִּלֶ֥גֶשׁ שָׁאֽוּל׃
And it was told David what Rizpah the daughter of Aiah, the concubine of Saul, had done.
Read kabbalistic (mystical) interpretation of II Samuel 21:11: and classical mystical sources.