וַיַּשְׁלֵ֥ם יְהוֹשָׁפָ֖ט עִם־מֶ֥לֶךְ יִשְׂרָאֵֽל׃
און יהוֹשפֿט איז געװען אין שלום מיט דעם מלך פֿון ישׂראל.
Rashi
Yehoshofot made peace with the king of Yisroel. Since there was war between Asa his father and Basha the king of Yisroel, it was necessary to say this.