וַיַּשְׁלֵ֥ם יְהוֹשָׁפָ֖ט עִם־מֶ֥לֶךְ יִשְׂרָאֵֽל׃
Josaphat fut en paix avec le roi d’Israël.
Rashi on I Kings
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.