וְלֹא־זָכַ֞ר יוֹאָ֣שׁ הַמֶּ֗לֶךְ הַחֶ֙סֶד֙ אֲשֶׁ֨ר עָשָׂ֜ה יְהוֹיָדָ֤ע אָבִיו֙ עִמּ֔וֹ וַֽיַּהֲרֹ֖ג אֶת־בְּנ֑וֹ וּכְמוֹת֣וֹ אָמַ֔ר יֵ֥רֶא יְהוָ֖ה וְיִדְרֹֽשׁ׃ (פ)
Thus Joash the king remembered not the kindness which Jehoiada his father had done to him, but slew his son. And when he died, he said: ‘The LORD look upon it, and require it.’
Read halakhic rulings (Jewish law) on II Chronicles 24:22: and classical halakhic sources.