לֹא־כֵ֣ן הַדָּבָ֗ר כִּ֡י אִישׁ֩ מֵהַ֨ר אֶפְרַ֜יִם שֶׁ֧בַע בֶּן־בִּכְרִ֣י שְׁמ֗וֹ נָשָׂ֤א יָדוֹ֙ בַּמֶּ֣לֶךְ בְּדָוִ֔ד תְּנֽוּ־אֹת֣וֹ לְבַדּ֔וֹ וְאֵלְכָ֖ה מֵעַ֣ל הָעִ֑יר וַתֹּ֤אמֶר הָֽאִשָּׁה֙ אֶל־יוֹאָ֔ב הִנֵּ֥ה רֹאשׁ֛וֹ מֻשְׁלָ֥ךְ אֵלֶ֖יךָ בְּעַ֥ד הַחוֹמָֽה׃
The matter is not so; but a man of the hill-country of Ephraim, Sheba the son of Bichri by name, hath lifted up his hand against the king, even against David; deliver him only, and I will depart from the city.’ And the woman said unto Joab: ‘Behold, his head shall be thrown to thee over the wall.’
Read kabbalistic (mystical) interpretation of II Samuel 20:21: and classical mystical sources.