וַיָּקֻ֥מוּ עֲבָדָ֖יו וַיִּקְשְׁרֽוּ־קָ֑שֶׁר וַיַּכּוּ֙ אֶת־יוֹאָ֔שׁ בֵּ֥ית מִלֹּ֖א הַיּוֹרֵ֥ד סִלָּֽא׃
And his servants arose, and made a conspiracy, and smote Joash at Beth-millo, on the way that goeth down to Silla.
Read midrashic interpretation of II Kings 12:21: and classical rabbinic exegesis.