וְנָדָ֣ב בֶּן־יָרָבְעָ֗ם מָלַךְ֙ עַל־יִשְׂרָאֵ֔ל בִּשְׁנַ֣ת שְׁתַּ֔יִם לְאָסָ֖א מֶ֣לֶךְ יְהוּדָ֑ה וַיִּמְלֹ֥ךְ עַל־יִשְׂרָאֵ֖ל שְׁנָתָֽיִם׃
And Nadab the son of Jeroboam began to reign over Israel in the second year of Asa king of Judah, and he reigned over Israel two years.
Read midrashic interpretation of I Kings 15:25: and classical rabbinic exegesis.