וְיֶ֨תֶר דִּבְרֵ֧י יְהוֹאָחָ֛ז וְכָל־אֲשֶׁ֥ר עָשָׂ֖ה וּגְבוּרָת֑וֹ הֲלוֹא־הֵ֣ם כְּתוּבִ֗ים עַל־סֵ֛פֶר דִּבְרֵ֥י הַיָּמִ֖ים לְמַלְכֵ֥י יִשְׂרָאֵֽל׃
Now the rest of the acts of Jehoahaz, and all that he did, and his might, are they not written in the book of the chronicles of the kings of Israel?
Read Midrashic interpretations of II Kings 13:8: rabbinic exegesis from Bereshit Rabbah, Shemot Rabbah and classical Midrash sources, free.