וְיֶ֛תֶר דִּבְרֵ֥י יוֹרָ֖ם וְכָל־אֲשֶׁ֣ר עָשָׂ֑ה הֲלֽוֹא־הֵ֣ם כְּתוּבִ֗ים עַל־סֵ֛פֶר דִּבְרֵ֥י הַיָּמִ֖ים לְמַלְכֵ֥י יְהוּדָֽה׃
And the rest of the acts of Joram, and all that he did, are they not written in the book of the chronicles of the kings of Judah?
Read Kabbalistic (mystical) interpretations of II Kings 8:23: Zohar and classical Jewish mystical sources, free online.