וְיֶ֙תֶר֙ דִּבְרֵ֣י אֲבִיָּ֔ה וּדְרָכָ֖יו וּדְבָרָ֑יו כְּתוּבִ֕ים בְּמִדְרַ֖שׁ הַנָּבִ֥יא עִדּֽוֹ׃
And the rest of the acts of Abijah, and his ways, and his sayings, are written in the commentary of the prophet Iddo.
Read midrashic interpretation of II Chronicles 13:22: and classical rabbinic exegesis.