וַיִּקְשְׁר֥וּ עַבְדֵֽי־אָמ֖וֹן עָלָ֑יו וַיָּמִ֥יתוּ אֶת־הַמֶּ֖לֶךְ בְּבֵיתֽוֹ׃
And the servants of Amon conspired against him, and put the king to death in his own house.
Read midrashic interpretation of II Kings 21:23: and classical rabbinic exegesis.