וְשָׁ֤בוּ דְמֵיהֶם֙ בְּרֹ֣אשׁ יוֹאָ֔ב וּבְרֹ֥אשׁ זַרְע֖וֹ לְעֹלָ֑ם וּלְדָוִ֡ד וּ֠לְזַרְעוֹ וּלְבֵית֨וֹ וּלְכִסְא֜וֹ יִהְיֶ֥ה שָׁל֛וֹם עַד־עוֹלָ֖ם מֵעִ֥ם יְהוָֽה׃
So shall their blood return upon the head of Joab, and upon the head of his seed for ever; but unto David, and unto his seed, and unto his house, and unto his throne, shall there be peace for ever from the LORD.’
Read midrashic interpretation of I Kings 2:33: and classical rabbinic exegesis.